“Free as in speech, but not free as in beer,” is the refrain made famous by Richard Stallman, the standard bearer of the free software movement. However, many free software advocates seem to be of the opinion that the purity of free software is somehow tainted by any preoccupation with money or profit. Inevitably, this has implications for the economic sustainability of free software, for without a source of income, how can free software hope to survive? The challenge of finding a way to ensure economic sustainability without sacrificing the ideals of free software is what we have termed the “software dialectic.”
While the literature on the economics of free software is already quite substantial, in this essay we approach the subject by considering first principles, such as the difference between wealth and money, how the market chooses what to produce, and what the laws of thermodynamics have to do with economics. Finally, even though the ideas expressed in this essay apply to free software in general, here we shall be focusing on that particular incarnation of free software known as the GNU/Linux system.
The Midas fallacy
Commodification, property rights, and the exclusion principle
Ubuntuism, or the freedom to help your neighbour
A model of economic entropy
Closed system and open system distros
Red Hat: A case study in the commodification of free
Debian: The apotheosis of Ubuntuism
Free software is not a perpetuum mobile
The old saying that there is no such thing as a free lunch is so trivial and obvious that it seems hardly worth mentioning. Yet, to paraphrase DeLong (2004), free software advocates often treat the topic of money like the Victorians treated sex: everyone knew that sex must exist to produce little Victorians, but any talk about sex was considered verboten.
DeLong’s analogy might seem a little exaggerated, but there is no denying that money has long been a touchy subject in free software circles, and even though attitudes have mellowed in recent years, you still run the risk of wearing out your welcome among free software advocates by using words like money and profit too freely.
On the other hand, contrary to the image often painted of him as a head–in–the–clouds, anti–capitalist ideologue, Richard Stallman, the standard bearer of the free software movement, takes a rather pragmatic view. According to him, free software is not opposed to the making of money. As he writes:
“Many people believe that the spirit of the GNU project is that you should not charge money for distributing copies of the software, or that you should charge as little as possible — just enough to cover the cost.
Actually, we encourage people who distribute free software to charge as much as they wish or can.” 
According to Stallman, the money earned from selling the software can then be used to support the growth of free software:
“Distributing free software is an opportunity to raise funds for development. Don't waste it!
In order to contribute funds, you need to have some extra. If you charge too low a fee, you won’t have anything to spare to support development.” 
Perhaps one of the reasons why free software advocates exhibit such ambivalence about the subject of money is that free software is based on a philosophy of inclusion, cooperation, sharing, and openness, while the market is synonymous with self–interest, secretiveness, competition, and the exclusion of those who do not, or cannot, pay. The challenge of reconciling these two contradictory opposites is what constitutes the “software dialectic.” 
Since this is a discussion that raises fundamental economic questions, it will also be a discussion about first principles, namely the difference between wealth and money, how the market chooses what to produce, and what the laws of thermodynamics have to do with economics.
Finally, even though the ideas expressed in this essay apply to free and open source software projects in general, here we will be focusing on the GNU/Linux system . It should also be noted that even though the terms free software and open source software are often used interchangeably in the literature, the truth is that the terms open source and free software refer to separate movements with different goals. Since in this essay, we are concerned with the economic as well as the social and ethical aspects of free and open source software, we shall be making a distinction between free and open source software.
The Midas fallacy
Most of us are familiar with the Greek legend of King Midas. To many it is a cautionary tale about the dangers of avarice. For economists, however, the story of King Midas may hold another lesson. This is that wealth and gold (or money) are not the same thing. After all, here was the world’s richest man in danger of dying from hunger and thirst no different from a destitute beggar on the streets. The king was in danger of dying from hunger and thirst because everything he touched turned to gold, which meant that food and drink was also rendered inedible. Clearly, when Midas asked Dionysus for the power to turn everything he touched into gold, he was not interested in gold as an end in itself, but rather in the things that gold could buy.
The tendency to confuse money with wealth is what we are referring to as the Midas fallacy. Wealth may be defined as goods and services that satisfy material human wants and needs, while money simply represents a convenient if imperfect way to measure and exchange wealth. Or to put it in the far more euphonious prose of the 18th century Scottish philosopher David Hume:
“Money is not, properly speaking, one of the subjects of commerce; but only the instrument which men have agreed upon to facilitate the exchange of one commodity for another. It is none of the wheels of trade: it is the oil which renders the motion of the wheels more smooth and easy.” 
Now, while anybody in King Midas’ position might probably be more concerned about how to convert money (gold) into wealth (food and drink for a start), in this essay we are more concerned with how to convert wealth (namely free software) into money, which brings us to the subject of commodification.
Commodification, property rights, and the exclusion principle
Economists classify goods into two categories: private and public . The market mechanism is well suited to the provision of private goods. The market mechanism is based on exchange and exchange can occur only where there is an exclusive right of ownership to the property which is to be exchanged. In fact, the market system may be viewed as a system for the exchange of property rights.
To put it another way, the market can function only in a situation where the “exclusion principle” applies, i.e., where A’s consumption is made contingent on A’s paying the price, while B, who does not pay is excluded. Exchange cannot occur without property rights, and property rights require exclusion. The market therefore tends to cater to those particular consumer demands that are amenable to the exclusion principle. This bias means that in situations where exclusion would be impossible or prohibitively expensive no goods or services will be provided by the market mechanism, even if the provision of such goods or services is socially desirable, and a situation known as “market failure” occurs.
A classic example of market failure is national defence. Since it is impossible to provide the benefits of national defence to those of the country’s inhabitants who are prepared to pay while excluding the benefits from those who are not prepared to pay, each individual will find it in his or her interest to consume without paying, or to “free–ride.” Without the ability to exclude free riders, the incentive to provide national defense through the market thus disappears and it is for this reason that certain services, such as national defence, must be provided by the government .
So what is commodification? Commodification may be described as the process by which the market establishes property rights and excluding devices to facilitate the production and exchange of wealth. In the software industry, excluding devices may include legal devices such as software licenses, and physical devices such as copy restriction and product activation codes .
Ubuntuism, or the freedom to help your neighbour
If the antithesis of exclusion is inclusion, then the antithesis of commodification is Ubuntuism. The term Ubuntuism is a neologism coined from the southern African word Ubuntu which is related to a Zulu concept, “umuntu ngumuntu ngabantu,” which means that a person is only a person through their relationship to others . This may also be expressed as “I exist because the community exists.” Because of its emphasis on “others” and “community,” Ubuntu may be described as a form of communitarianism. Communitarianism is a system of social organization that stresses the significance of mutual reciprocity, charity, fairness, openness, and a commitment to the common good. We shall be using the term Ubuntuism to refer to the communitarian philosophy in general.
Incidentally, lest we come away with the impression that Ubuntuism is some kind of romantic ideal, it should be noted that most historians and anthropologists are in agreement that communitarian social organization has in fact been the predominant form of social organization through almost all of human history and may date back millions of years to early ancestors such as the Australopithecines . This is also consistent with the insights of sociobiology which show that in the struggle for survival, a strategy based on cooperation and mutual support rather than selfishness and opportunism would be the optimal strategy .
Since this is a discussion about free software, one might ask, what is the link between Ubuntuism and free software? The link between Ubuntuism and free software lies in the ethic of sharing, mutual support, openness, and social solidarity which characterizes both Ubuntuism and the free software movement. In the free software movement this ethic is encapsulated in Richard Stallman’s famous Four Freedoms which are the guiding principles of the movement. These Four Freedoms are as follows :
Freedom 1: The freedom to run the program, for any purpose.
Freedom 2: The freedom to study the source code, and change it to make the program do what you wish.
Freedom 3: The freedom to redistribute copies so you can help your neighbor.
Freedom 4: The freedom to improve the program, and release your improvements to the public, so that the whole community benefits.
To quote Stallman (McGregor, 2008) on the importance of the Four Freedoms:
“[The Four Freedoms] give you control over your own computing, and make it possible to be part of a community where people help each other.... These values of freedom and social solidarity are the basic ideals of the free software movement, ever since its founding in 1983. These ideals were my motive for launching the development [of] the GNU operating system. They are the reason our community exists.”
The ethical underpinnings of free software are what distinguishes the free software movement from its offshoot, the open source movement. For the open source movement, the issue of whether software should be open source is a practical question, not an ethical one. As its proponents frankly admit, the concept of open source software was conceived with the explicit goal of making free software more appealing to the business community by citing the practical benefits of the open source development methodology . Proponents of free software, on the other hand, tend to see the ethical and social values as being more important. As a result, although nearly all open source software is free software , the free software movement and the open source movement are essentially separate movements with different views and goals.
Still, regardless of the differences between the two movements, the ideas expressed in this essay are applicable to both movements because both movements have to grapple with the question of how to maintain economic sustainability while largely forfeiting the opportunity to earn money the old–fashioned way — by hiding the source code and charging license fees .
A model of economic entropy
While the notion of entropy can be difficult to wrap one’s head around, it is at the same time of central importance to our approach. Here we shall attempt to provide a simplified (but hopefully, not simplistic) explanation of the concept.
Energy, it has been said, is the currency of the universe. However, the flow of energy in the universe is subject to a set of physical laws known as the laws of thermodynamics. Here we are interested in the second law of thermodynamics, also known as the law of entropy. The second law of thermodynamics states that the “entropy” of a “closed” system always increases. This means that such a system will spontaneously “run down” as all available energy is used up and eventually there is no potential for further useful work. A system which no longer has the capacity to do useful work because all the energy available to it has been used up is said to be in a state of maximum entropy.
A useful analogy to describe the second law is an hour glass . An hour glass can be considered a closed system in that no sand enters the glass and none leaves. But although the quantity of sand in the hour glass is constant, the bottom chamber is filling up and the top chamber is becoming empty. The sand in the bottom chamber may be seen as a measure of the amount of entropy in the system. Sand in the top chamber is capable of doing work by falling, like water at the top of a waterfall, while sand in the bottom chamber has spent its capacity to do work. The second law therefore states that whenever work is done the amount of usable energy in the system declines, which, in the case of a closed system, means that the system will eventually run down.
“Open” systems, on the other hand, unlike closed systems, receive an inflow of material and energy from their environment so that they do not run down. In the terminology of the physicist Erwin Schrödinger (1945), open systems receive “negative entropy” from the environment. Biological systems such as human beings are good examples of open systems.
Because every process of production is, at bottom, a transformation of energy and matter, it should come as no surprise that a number of economists have found the laws of thermodynamics to be concepts with considerable relevance for economics. In fact, interest in the laws of thermodynamics has led to the rise of an approach known as thermoeconomics . Approaches within thermoeconomics range from from those that seek to develop highly technical analytical models of the economy based on the laws of thermodynamics, to those that view thermodynamic concepts as analogies and metaphors. While the analogies–and–metaphors approach may not allow us to make exact and deductive scientific statements about economic systems, it still has merit as a heuristic, with the capacity to allow us to see economic phenomena in a new light and hence stimulate research in new and potentially fruitful directions. In this essay we will be taking the analogies–and–metaphors approach.
So, how do we incorporate the entropy law into our model? If we acknowledge that any process of economic production is dependent on close interaction with the environment from which it extracts materials and energy, then it follows that any process of economic production that remains isolated from its surroundings, in the sense that it does not receive any inputs from its surroundings, will eventually succumb to “economic entropy.” In other words, it will eventually become incapable of generating any more outputs just as a thermodynamic system that has used up all its energy is incapable of doing any more work.
Now, we should make it clear that when we talk of a closed economic system we are not talking of a closed system in the physics sense, that is, a completely self–contained system that does not exchange any matter or energy with its environment, very much like the hour glass in our analogy. Instead, we are talking of a quasi–closed system (see Figure 1 below) which, in addition to exchanging outputs with its environment, may receive inputs from its environment, but these “exogenous” inputs (represented by the arrow with a dashed line in Figure 1) are so limited relative to the material and energy requirements of the system that the system has to rely mainly on its own internal resources or “endogenous” inputs, which are presumed to be finite, which in turn means that the system faces the risk of running down sooner or later.
Figure 1: Closed and open systems of economic production.
The next question is, what constitutes inputs in our model? According to the production function, q=f(x1,x2 ...xn), which is the standard way of representing the production process in economic models, inputs typically comprise labour, capital (both financial and physical), and raw materials . One might therefore say, that as long as there is a steady and sufficient supply of these inputs in any production process, then economic entropy can be avoided.
Closed system and open system distros
Having outlined a concept of economic entropy, let us now apply the concept to the GNU/Linux system which is the focus of this essay .
We generally encounter the GNU/Linux system in the form of a “distribution.” So it would be in order to start by explaining what a distribution is. A distribution, or distro, to use the popular term, is an operating system comprising the Linux kernel and an assortment of applications in binary form but also available in source code form. Now, in principle, users could obtain the Linux kernel via the Internet and they could then obtain source code for the applications in the same way, and then compile and integrate the programs to assemble a working GNU/Linux system. However, this process is both very demanding and time–consuming. To avoid the hassle of “rolling” their own distributions, therefore, users often choose to obtain complete, ready–made systems from “distributors,” the companies or individuals that undertake the task of creating such systems.
GNU/Linux distributions come in all shapes and sizes. They range from small, single–CD, single–purpose distros like SystemRescueCd (whose main task, as its name suggests, is to “rescue” systems after a crash) to massive, everything–but–the–kitchen–sink, multiple–CD distros like Debian. Distros can also be distinguished along the lines of software package formats, that is, whether they are RPM–based distros, deb–based distros, or tgz–based distros. But distros can also be distinguished along the lines of whether they are closed system distros or open system distros.
In the previous section we described a closed system as a system which may receive inputs from its environment but these exogenous inputs are so limited relative to the material and energy requirements of the system that the system has to rely mainly on its own endogenous inputs which are however assumed to be finite, which means that the system faces a high risk of running down.
Since building and maintaining a distro is an intrinsically labour–intensive activity, an admittedly unsophisticated but, in our view, effective way to measure the level of “openness” of a distro is to look at the number of developers involved in the project. By this standard, a typical closed system distro will have a very small group of developers, even just one or two developers, often the creators of the project, working on it. In addition, alongside the low developer headcount, we are also likely to find that the majority of the resources available to the project are being provided by the developers themselves. In short, a closed system distro will be largely dependent on endogenous inputs as indicated by the small number of developers working on it and the greater reliance on internal sources of funds. Here we must also clarify an important point. That point is that even though developers working on a closed system distro may rely on the external environment for their income, say in the form of a salary from a regular job, from the perspective of the distribution, such income constitutes an internal and not an external source of funds.
Coming to open system distros, such distros by contrast will be able to draw on the environment for developers as well as other resources. Hence, we would expect an open system distro to have considerably more developers working on it in addition to having better external sources of funds.
Using the number of developers and the sources of funds as our main yardsticks, in the following tables we present a selection of the most popular distros divided into closed system and open system distros .
Table 1: Closed system distros.
Table 2: Borderline open system distros.
Table 3: Open system distros.
In many cases closed system distros have become synonymous with their creators. Thus, it may be difficult to imagine Knoppix without Klaus Knopper or Mepis without Warren Woodford. While this may be part of the charm of a closed system distro, it can also be a serious shortcoming because whether there is a new release or not may be heavily dependent on the creator’s situation. Thus, for example, for some time Klaus Knopper has been working on ADRIANE, a desktop system designed for visually impaired computer users (Knopper’s wife, Adriane, is blind) . As a result, Knopper has had less time to work on the “regular” Knoppix which has affected the frequency of new releases . As for Mepis, since 2005 Warren Woodford’s work on the distribution has been slowed down by a back problem . More recently, when new concerns were raised about the future of Mepis given the prolonged lack of news on the distribution, Woodford disclosed that work on Mepis had suffered because he “finally had to reenter the workforce as a consultant in order to pay the bills. I can [earn] more in two weeks of consulting, then in a year with MEPIS” (Vaughan–Nichols, 2007). Woodford’s revelation also lends more support to our characterization of closed system distros as lacking adequate external sources of funds.
Meanwhile, we have referred to Slackware as a borderline open system distro (Table 2) rather than a fully open system distro. This is because even though Slackware makes enough money to support its creator “Pat” Volkerding (TLLTS, 2006), and has a “development team” with about a dozen (most likely volunteer) developers, the evidence suggests that Volkerding still does most of the development work himself, and it might be just as difficult to imagine Slackware without Volkerding as it might be to imagine Knoppix and Mepis without Knopper and Woodford. Ultimately, because of their dependence on a handful of individuals or just one individual, the chances are high that closed system distros and borderline open system distros may cease to exist if these individuals, for whatever reason, are unable to continue working on them .
Fully open system distros, on the other hand, tend to develop a separate identity and existence from their creators. For instance, even though the Debian distribution still bears the name of its creator Ian Murdock (the ‘ian’ in Debian) , the project has long since acquired a life of its own. Similarly, Red Hat is no longer tied to its founders Mark Ewing and Bob Young , and Mandriva even fired one of its founders (Mandriva–a).
The last few years have seen a massive proliferation of GNU/Linux distros (there are estimated to be over 300 “active” GNU/Linux distributions) , most of which we would probably classify as closed system distros, and it is common to hear people decrying the proliferation of distros as a wasteful duplication of effort  and a cause of unnecessary confusion and frustration to users.
Such proliferation may be described as a “widening” process. This widening process in itself needn’t be a bad thing. Besides, the freedom to tinker with code is supposed to be one of the main freedoms, and strengths, of free software. But it could also be argued that if GNU/Linux is to solidify its position as a viable alternative to proprietary or non–free software, then “deepening”, which implies a greater focus on qualitative improvements, as opposed to mere quantitative increase, is also needed. Such deepening may involve adding important, new functions to software, or it may simply involve making existing functions more robust and efficient.
Now, while many, if not most, of the developers working on closed system distros are undoubtedly very talented and innovative people, it appears to us that deepening, especially the kind that involves making fundamental improvements to the software, is more likely to be undertaken by open system distros because such distros, almost by definition, are in a better position to carry out the skill– and resource–intensive activity of R&D. As an example, in the fiscal year ending 28 February 2007, Red Hat spent US$71 million on R&D , a figure well beyond the capability of any closed system distro.
Let us now try to pull together the threads of our argument by looking at two major open system GNU/Linux distros, each pursuing a different strategy in the attempt to overcome economic entropy.
Red Hat: A case study in the commodification of free
Red Hat is the proverbial garage startup. In 1994, Marc Ewing, who had recently graduated from Carnegie Mellon University, created his own version of Linux working out of his spare bedroom. He named his version Red Hat Linux. Marc’s release of his initial beta of Red Hat, the “Halloween” edition, earned him instant fame in Linux newsgroups. Shortly afterwards, Bob Young, owner of the ACC Corporation, a small catalog business that sold Linux and UNIX products, called Ewing up because he wanted to add Red Hat to his catalog of Linux products. A few months later, Young and Ewing agreed to merge Marc’s Linux business with Ewing’s ACC corporation, and Red Hat Software Ltd. was born .
Of course, Red Hat was not the only distribution available at the time. There were already other distributions such as SLS, Yggdrasil, and Slackware. But Red Hat’s selling point was that it developed a software program to aid in the complicated package installation and upgrade process. That program was the Red Hat Package Manager or RPM in short. Thanks to RPM, coupled with efforts to make the system easier to install and configure, Red Hat’s popularity soared.
From the outset, however, it must have been clear that selling software as a product was not going to be an easy way to build a sustainable business. This was because while the GNU General Public License or GPL — the copyright license that gives legal expression to the Four Freedoms and under which the Linux kernel and much of the software in the GNU/Linux system is licensed — has no requirements about how much you can charge for distributing a copy of free software , it also allows, even encourages, users to copy and distribute the software. People could thus redistribute copies of Red Hat without a penny coming to Red Hat . Furthermore, because competitors had access to the same freely available source code as Red Hat, there were limits to what Red Hat could charge for its product. As Bob Young (Martin, 2007) put it (brackets appear in original quote): “You couldn’t make any money selling [the Linux] operating system...because all this stuff was free, and if you started to charge money for it, someone else would come in and price it lower.” 
Given the difficulty of surviving on software product sales alone, Red Hat had to search for a new business model. Despite the growing popularity of the GNU/Linux system, one of the biggest obstacles to GNU/Linux adoption in the corporate environment was a lack of support services. Seeing this as an opportunity, Red Hat begun to look into providing post–sales support to corporate clients. This marked the switch to what may be described as the “sell religion, not bibles” strategy with Red Hat moving up the software value chain from a business based largely on software sales (bibles) to one that was based largely on the sale of ancillary services related to its software (religion).
Figure 2: The software value chain (adapted from Berlecon Research ).
As shown in Figure 2, we have divided the software value chain into two sections: software packaging and software services. Software packaging refers to the traditional model of selling software as a product. Since we are talking about GNU/Linux distributions, software packaging would involve the aggregation, integration, and optimization of the Linux kernel and the numerous additional files that together form the GNU/Linux operating system, to create a distribution which may be accompanied by a manual and probably some post–sales support.
Software services, on the other hand, refer to the provision of support, maintenance, training, integration, customization, and consulting services. Since GNU/Linux distributors have already built up technical competence from packaging and optimising the GNU/Linux system, the presumption is that they can capitalise on this know–how to provide support, consulting, and other services.
In 2003, as part of its new business strategy, Red Hat discontinued its retail edition of Red Hat and introduced Red Hat Enterprise Linux. Red Hat Enterprise Linux was to be sold on a subscription basis. A subscription entitled the user to a copy or copies of Red Hat Enterprise Linux, support services including installation and other technical assistance, and access to patches and updates through the Red Hat Network service.
So, to put Red Hat’s experience within the framework of the software dialectic, the exclusion principle did not work well with software sales because free and open source licenses in general circumscribe the opportunities for earning money through license fees, the source code is freely available to competitors, and people are allowed to share and redistribute the software virtually as a right. With the services approach on the other hand, only those who buy a subscription are eligible to receive support from Red Hat, and even though adaptations of Red Hat Enterprise Linux such as CentOS can be downloaded for free off the Internet, access to support and maintenance services as well as updates to official Red Hat packages via the Red Hat Network are only available to subscribers.
The evidence suggests that this approach has paid off handsomely for Red Hat. In the fiscal year 2007–2008, Red Hat achieved revenues of US$523 million and a net income of US$76.7 million (Red Hat, 2008). Total cash, cash equivalents, and investments as of 29 February 2008 were US$1.3 billion, and at the time of writing, the company had a market capitalization hovering around US$4 billion.
At the same time, Red Hat has always made an effort to remain on good terms with the free software community by making all of its source code available to the community and by supporting various free software projects . Red Hat is also a founding member of the Open Invention Network which is a company that acts as a “patent pool” whose members have agreed not to assert their patents against GNU/Linux or GNU/Linux–related applications .
Though Red Hat’s behaviour may ultimately be guided by the less noble need of turning a profit and keeping its shareholders happy, it has attempted to do so while remaining scrupulously faithful to the letter, if not the spirit , of the GPL.
Debian: The apotheosis of Ubuntuism
On 16 August 1993, Ian Murdock, an undergraduate student at Purdue University, announced the “Debian Linux Release” (Murdock 1993). The development of Debian came as a result of Murdock’s disenchantment with GNU/Linux distributions at the time. According to Murdock, though many distributions had started out as fairly good systems, as time passed, attention to maintaining the distribution became a secondary concern (Murdock, 1994). Murdock gave the example of the Softlanding Linux System (SLS) which he described as possibly the most popular distribution at the time. Unfortunately, according to Murdock, SLS was also “quite possibly the most bug–ridden and badly maintained Linux distribution available.” This meant that GNU/Linux users were being subjected to an inferior product and their bad experiences were bound to undermine the prospects of GNU/Linux. To Murdock, the time had come “to concentrate on the future of Linux rather than on the destructive goal of enriching oneself at the expense of the entire Linux community and its future.” The primary purpose of the Debian project therefore was to create a distribution that would “live up to the Linux name” by being carefully and conscientiously assembled, maintained and supported.
Another important aspect of Murdock’s plan was that unlike other distributions “which are developed by individuals, small, closed groups, or commercial vendors”, Debian was to be developed cooperatively by many individuals through the Internet, in the same spirit as the Linux kernel and other free software. This “open process,” Murdock believed, would ensure that the system was of the highest quality and that it reflected the needs of the user community rather than the needs and wants of the constructor.
Finally, for users who were not in a position to download the distribution from the Internet, Debian was to be made available on physical media at little more than cost, and any profits earned would be used to support the further development of free software.
It was an ambitious plan, but thanks to the hard work and enthusiasm of Ian Murdock and the others who succeeded him in the role of Debian project leader, Debian grew from a single PC under a student’s desk at Purdue University, to paraphrase Bdale Garbee (2007) , to become a large, worldwide community of developers  and users. Currently, the project boasts more than 1,400 developers in over 40 countries collaborating via the Internet, and even though no one gets paid to work on Debian, anecdotal evidence suggests that there is no shortage of applicants wishing to become developers.
Debian is also by far the largest GNU/Linux distribution. Based on source lines of code (SLOC) analysis, the estimated size of the latest release, Debian 4.0, amounts to close to 283 million source lines of code (Amor, et al., 2007). Using the Constructive Cost Model (COCOMO) to estimate the effort and cost that would be involved in building a system the size of Debian 4.0 from scratch, we get an effort equivalent to 73,000 person years and a cost of around US$10 billion (Amor, et al., 2007). The Debian project therefore represents a monumental effort of wealth creation which is barely reflected in the economic statistics, a perfect example of the Midas fallacy .
But size is not the only noteworthy thing about Debian. Thanks to its reputation for stability, which owes much to its stringent quality assurance procedures , many major organizations around the world now rely on Debian. Examples include the Municipal Council of the City of Munich, MIT Computer Science and Artificial Intelligence Lab, and Genome Research Cluster at the Sanger Institute, which is the single largest contributor to the public Human Genome Project. Telegraaf Media ICT BV, which runs some of the most popular Dutch Web sites as well as the two biggest newspapers in the Netherlands, also runs its internet infrastructure on Debian. But perhaps most impressive of all is the claim by Bdale Garbee (2007) that there’s a 30 percent chance that anyone making a cell phone call anywhere in the world will be relying on Debian in some way. This is because HP, which is a major hardware vendor for telecommunications service providers, installs Debian on much of the hardware that it ships.
Debian, like free and open source software in general, appears to defy our preconceptions about how the economy should work. For here is a large and intricate software system which is being developed by a loosely coordinated, globally dispersed community of volunteers, it is being given away for free, and yet it is so highly regarded that major organizations are willing to trust it with some of their most critical operations. One could perhaps say that Debian is proof that the community model can work just as well as the commercial model. But questions about the sustainability of the community model still remain and we will have more to say about the subject shortly.
Free software is not a perpetuum mobile
The market mechanism is well suited to the production of goods where the benefits derived from a good flow exclusively to the person who paid for the good. Commodification is the name we have given to the process of establishing property rights and excluding devices over goods so that only those who pay for a good are entitled to its benefits. Due to its basis in exclusion, this process seems inimical to the spirit of free software which is the spirit of inclusion, cooperation, and sharing which we have termed Ubuntuism. So the question is, how does one reconcile these two contradictory opposites, commodification and Ubuntuism, so as to make free software economically viable while preserving the ideals of free software? This is the software dialectic.
As the example of Red Hat shows, it is possible to achieve some kind of synthesis between commodification and Ubuntuism. To recap, given the difficulty of applying the exclusion principle to GNU/Linux as a product, Red Hat decided to move up the value chain to areas, namely software services, where the exclusion principle could be more successfully applied. At the same time Red Hat has continued to strive to remain on good terms with the free software community by contributing all its code back to the community in accordance with the GPL, and also by supporting various free software projects.
In contrast to the Red Hat model is the Debian model which appears to bypass the software dialectic entirely by relying on donations and volunteer developers. But is this a sustainable model?
There is already a substantial literature on why people may chose to work on free software without remuneration . In a nutshell, people may be motivated by a desire to “scratch an itch” (i.e., to fix a bug or see some new function or feature added to the software), the enjoyment and intellectual stimulation of the activity, a sense of belonging and contributing to a cause, a desire to improve one’s programming skills, striving for recognition among peers, as a way to “signal” one’s skills to prospective employers, or a combination of the above. If one assumes that Debian developers are no different from other free software developers, then one can probably say that as long as there are people willing to work on free software there will be people willing to work on Debian.
What are the motives of Debian developers specifically? We know that there is a general stability in the Debian volunteer effort (Robles, et al., 2005). For a start, Debian developers tend to commit to the project for long periods of time: at least half are expected to remain with the project for seven and a half years, which is probably longer than terms of employment in many software companies. Second, when developers leave the project most of their work tends to be taken over by other developers so that continuity is ensured. Robles, et al. also noted that there has been a trend towards the formation of developer teams to maintain packages. These developer or “maintainer” teams help reduce reliance on individual developers and minimize the impact that the departure of any single developer might have on the project.
Michlmayr (2004) found that over the years the admission process into the Debian project has become more elaborate and time–consuming. While some would argue that a more onerous admission process only serves to discourage new developers from joining the project, Michlmayr suggests that the increased complexity of the admission process may not only act as a way of screening out volunteers who lack good technical skills, but it may also act as a way of screening out volunteers who are not likely to show a high level of commitment to the project. Though Michlmayr offers some suggestions as to how this hypothesis might be tested, to our knowledge no such study has been undertaken so far .
Besides stability in the volunteer effort, Debian has also been enjoying increased corporate and institutional interest . This bodes well for the project because besides boosting Debian’s profile, there is a good chance that corporations and institutions, whether out of a desire to “give something back to the community” or just out of sheer self–interest, may choose to provide support to the project, whether by making donations, hiring Debian developers, or contributing developers and code to the project, thus improving the project’s long–term prospects.
On the whole, the continued success of the Debian project seems to support the view that with a well–defined vision that can galvanize people’s interest and involvement, good leadership , and the right organizational structures, the community model is just as viable as the commercial model, and just as capable of producing high quality software.
Alongside our discussion on the software dialectic we also had a discussion which used the entropy metaphor and the idea of closed systems and open systems to emphasize the fact that free software is not a perpetuum mobile or perpetual motion machine.
Since ancient times people have been trying to devise perpetual motion machines that would give us something for nothing. But so far the laws of thermodynamics have managed to frustrate all such efforts. Hence, until the laws of thermodynamics are repealed, to use Paul A. Samuelson’s phrase , it would be futile to expect to get something for nothing, or outputs without inputs. Closed systems will also continue to be liable to decline and breakdown because they have to rely on endogenous or internally available inputs, which are finite in supply. Open systems, on the other hand, are able to draw on inputs from their environment, and such exogenous inputs, while not necessarily limitless in supply, are relatively abundant. This means that, barring any malfunctions in the system or adverse changes in the environment, open systems can keep going indefinitely.
Based on our taxonomy of GNU/Linux distributions, in which we classify distributions into closed system distributions and open system distributions, we also argue that while there may be nothing inherently wrong with the current proliferation of distributions, a phenomenon we describe as “widening”, there is also a need for “deepening,” which refers to the need for sustained improvements to the GNU/Linux system. Though we admit that there are undoubtedly many skilled and ingenious developers working on closed system distros, in our view, given their greater access to resources and skilled personnel, open systems are in a much better position than closed systems to produce fundamental improvements to the GNU/Linux system.
Jon “Maddog” Hall is a well–known personality in GNU/Linux circles . During an interview on FLOSS Weekly, a popular free and open source software podcast (http://twit.tv/FLOSS), Hall recounts the following story . Back in the mid–1990s, when he was a marketing executive with the now–defunct Digital Equipment Corporation (DEC), Hall was on his way back home from a trip to Australia, when he made a stopover in Fiji and checked into a resort called the Hideaway Resort hoping to enjoy a brief vacation. But the Hideaway couldn’t have been much of a hideaway because the local DEC salesman found him and managed to persuade him to give a talk on the GNU/Linux system at the local university. At the university, Hall soon discovered that although the professors knew about GNU/Linux, it was difficult for them to get hold of a copy because at the time Fiji had an extremely dodgy connection to the Internet and every time anyone tried to download “a copy of the [Linux] kernel ... they’d get it halfway through and some storm in the South Pacific would hit and drop the line.”
So Hall took out the last GNU/Linux CD he had with him and as he handed it to the professors he was suddenly reminded of the painting in the Sistine Chapel in which God is giving the touch of intelligence to Adam . And this was when the penny dropped for him. Up until this point, he had been more impressed by the low or zero cost of the GNU/Linux system, but as he handed his last CD over it suddenly struck him that in that CD was the equivalent of billions of dollars of ideas and work that had been contributed by people from all over the world who were motivated by a desire to build a better operating system. “And that’s when I really begun to understand the whole thing,” Hall confesses in the interview .
While we might have mixed feelings about Richard Stallman’s more radical claims regarding the immorality of non–free software , we readily acknowledge that free software is a Promethean gift to the world as vividly portrayed in Maddog Hall’s story. We also acknowledge that without Stallman’s unwavering conviction and steadfast commitment, free software as we know it today might not exist. However, at the microeconomic level, how to ensure the sustainability of free software remains a vexed question.
As we have explained, in a market economy goods will be produced when only those who paid for them can consume their benefits. However, when benefits accrue to people other than the buyer of the good the producer will have less incentive to produce more goods. This forms the crux of the software dialectic. Free software favours inclusion rather than exclusion but for the market to provide goods it must be possible to exclude “free riders” from sharing in the benefits of a good.
In this essay we have discussed two approaches to the production of free software. These approaches are the commercial approach and the community approach. In the former approach, the software dialectic may be resolved by moving up the value chain, while in the latter approach the software dialectic may be avoided altogether by relying on donations and volunteers. Though some scepticism still remains about the long–term viability of the free software model, the fact that free software has continued to grow from strength to strength has given many observers pause for thought, and many are now less likely to ridicule free software as a quixotic idea.
A popular video on the Red Hat Web site quotes the Indian political and spiritual leader Mohandas Gandhi: “First they ignore you, then they laugh at you, then they fight you, then you win.”  Whether the free (and open source) software model will emerge as the dominant software development model, or whether this is just hyperbole, is something that remains to be seen. Even so, it is not a possibility that can be dismissed out of hand.
About the author
Mike Chege is an economist based in Nairobi, Kenya. His firm, Carpe Diem Africa, assists small and medium–sized enterprises in business planning and marketing strategy. Mike is also a commentator and advocate on matters relating to information and communication technologies (ICTs) in less–developed countries. Comments on this paper would be appreciated and can be sent to mikechege [at] gmail [dot] com.
1. Gay, 2002, p. 65.
3. Here we use the term “dialectic” not in the Socratic sense, but in the sense that the German philosopher Georg Hegel and his most famous disciple, Karl Marx, used it. According to Hegel and Marx, the dialectical process, comprising the stages of thesis, antithesis, and synthesis, was a general law governing not just society but nature itself. Though their ideas have long since been abandoned by most scholars, the Hegelian/Marxian dialectical framework may still serve a useful purpose. In this essay, we use the dialectical framework to describe the attempt to reconcile two contradictory positions (thesis and antithesis) in order to arrive at an outcome that accommodates both positions (the synthesis).
4. The GNU in GNU/Linux is a recursive acronym for “GNU’s not Unix.” The GNU project was the first major project of the free software movement. Initiated in 1984 by Richard Stallman, the goal of the GNU project was to create a complete, free as in freedom, operating system, consisting of a kernel, assemblers, compilers, text editors, mailers, and other programs. By 1990 the GNU system was almost complete but lacked one major component, the kernel. In 1991, Linus Torvalds, an undergraduate student at the University of Helsinki, developed a Unix–compatible kernel and called it Linux. Combining Linux with the GNU system resulted in a complete free operating system. The name GNU/Linux is therefore meant to express the composition of the system as a combination of the GNU system with Linux as the kernel while also ensuring that the ideal of freedom which led to the creation of the GNU system in the first place is not forgotten. An account of the history of the free software movement, the GNU project, and Linux can be found in Gay (2002, pp. 17–28).
5. Robinson and Eatwell, 1973, p. 6.
6. Much of the credit for the ideas expressed in this section must go to Fred Hirsch (1978) whose essay, “The new commodity fetishism,” inspired our use of the commodification concept. Elucidation of the commodification concept was also greatly aided by Richard and Peggy Musgrave’s text (1989, pp. 42–44).
7. Government of course does not provide such goods and services for free. Since the power of coercion is an essential feature of government, it can effectively counteract the free rider problem by requiring all who receive the benefits of a public good or service to pay appropriate taxes for it.
8. The physical devices mentioned are an attempt to turn software into a rival good. A rival good is a good whose consumption by one person diminishes its availability for others. For instance, when I eat an apple it is no longer available for anyone else. Or, if I sit on a chair, that chair is no longer available to anyone else to sit on until I relinquish it. In contrast, software on a CD or DVD can, like the biblical fish and seven loaves that fed the multitude, be duplicated indefinitely or installed on an infinite number of machines, so that my use of the software does not diminish its availability to others. Hence, in an attempt to make consumption of software rivalrous, software publishers may introduce such techniques as copy restriction of media and product activation codes.
9. The term Ubuntu has gained prominence in recent years in part due to its popularisation by major public figures such as Nelson Mandela, Desmond Tutu, and even Bill Clinton (Coughlan, 2006). Within the free and open source software communities, the term is mostly associated with the popular Ubuntu Linux distribution.
10. Stavrianos, 1990, pp. 17–23; Though Stavrianos refers to the system as “kinship society,” it is essentially communitarianism by another name.
11. See Heylighen and Campbell (1995) for a discussion on the evolution of cooperation.
12. Based on Stallman (Gay, p. 43).
13. See, for instance, Eric Raymond (1999b).
14. That is, software that is licensed under the GNU General Public License or GPL, the copyright license that gives legal expression to the Four Freedoms, and, we would add, GPL–compatible licenses such as the Modified BSD license, the Perl license, and certain Python licenses.
15. Free and open source software does not completely shut the door on the possibility of earning money through licensing fees. Companies can make money from licensing fees by resorting to a dual licensing strategy. This involves offering their software under two different licensing schemes, a proprietary licensing scheme and a free or open source licensing scheme. However, as Bruce Perens (2005) explains, dual licensing is better suited to software libraries and generally isn’t usable for applications, which therefore limits the number of situations in which dual licensing may be applicable. In the final analysis, however, the mixing of proprietary and free and open source licenses does seem to run counter to the concept of free and open source software.
The same objection would also apply to any strategy based on the bundling of proprietary software with free and open source software as a way of promoting a free and open source software product.
16. This analogy appears in an excerpt from Daly and Cobb (1994) on the DieOff Web site (http://www.dieoff.org/). The analogy is attributed to the economist Nicholas Georgescu–Roegen (see http://en.wikipedia.org/wiki/Nicholas_Georgescu-Roegen).
17. Or, alternatively, bioeconomics. Nicholas Georgescu–Roegen is considered to be one of the pioneers of thermoeconomics with his monumental work The entropy law and the economic process (Cambridge, Mass.: Harvard University Press, 1971). A brief yet informative introduction to thermoeconomics is provided by Baumgärtner (2005). Other works worth consulting are Gowdy and Mesner (1998) and Corning (2002).
18. Where q is the quantity of output and x1,x2...xn are the quantities of the inputs used. f is simply the mathematical notation for “is a function off” or “depends upon.” Of course, the production function concept is not without its critics (see for example Baumgärtner (2005, p. 117) in the context of thermodynamics, and Mishra (2007) in the context of traditional economic analysis), but for present purposes such criticisms should not pose a problem.
19. Though not all the software in the GNU/Linux system is licensed under the GPL, free software forms a significant part of the GNU/Linux system and this includes some of the most essential components such as the Linux kernel itself, without which there would be no system. For more on the rationale behind the name GNU/Linux, refer to note .
20. Information on how many developers are involved in a distribution is generally hard to come by. We have only included those distributions for which we have fairly reliable information. Information on the Slackware distribution is from an interview with Patrick Volkerding, the creator of Slackware, on The Linux Link Tech Show (TLLTS, 2006). The information on Knoppix comes from a search on “Knoppix” and “Klaus Knopper” on the free and open source software news site, Distrowatch (Distrowatch–a), and the Wikipedia entries on Knoppix and Klaus Knopper (Wikipedia–a; Wikipedia–b). Information on the Mepis distribution comes from an interview with Warren Woodford, the creator of Mepis, on the Linux Link Tech Show (TLLTS, 2007). Details on Mandriva are from the Mandriva corporate information Web page (Mandriva–b), while details on the Debian and Red Hat distributions are from Amor, et al. (2007) and Red Hat Vice President and CTO Brian Stevens’ keynote address at the 2007 Red Hat Summit (Red Hat, 2007b), respectively. Information on sources of funds was gathered from the distributions’ Web sites.
21. While Knopper obviously named the ADRIANE desktop system after his wife, ADRIANE is also an acronym for Audio Desktop Reference Implementation and Networking Environment, as explained on the Knopper.net Web site (http://www.knopper.net/).
22. There was whole year between releases from March 2007 (version 5.2) to March 2008 (version 5.3), as opposed to the usual three–five month release cycle.
23. In an interview on the Linux Link Tech Show (TLLTS, 2007), Woodford revealed that he had been suffering from a herniated disc in his back for around three years. This had affected his productivity but unfortunately he did not have the money to pay for the expensive surgery needed to fix the problem.
24. This was the fate that befell Libranet GNU/Linux, a popular commercial distribution. Designed as an easy–to–install Debian–based distribution back in the days when installing Debian was still something of an ordeal, Libranet ran into problems following the demise of its creator, Jon Danzig, in June 2005. Tal, Danzig’s son, attempted to keep the distribution going but eventually abandoned the task (Danzig, 2005, 25 November).
25. The ‘Deb’ in Debian comes from the first name of Murdock’s girlfriend (now wife) Debra.
26. According to Yahoo! Finance (http://finance.yahoo.com/), Mark Ewing and Bob Young are now neither major shareholders nor key executives in the company.
27. For a list of known distributions refer to Distrowatch (Distrowatch–b) and LWN.net (LWN.net). An “active” distribution is a distribution that is still being maintained and updated.
28. See, for instance, Vaughan–Nichols (2005).
29. Red Hat, 2007a, p. 15.
30. Red Hat Software Ltd. became Red Hat, Inc. in June 1999.
31. In Stallman’s words (Gay, p. 72), “you can charge nothing, a penny, a dollar, or a billion dollars.”
32. In 2001 it was reported that of the 15 million to 20 million copies of the Red Hat distribution that were in the marketplace, only about 1.5 million copies had actually been purchased from Red Hat (Reason, 2001). This seems to belie Bob Young’s “Evian Water” argument (Young, 1999). According to this argument, for the same reason that are many people who would rather buy expensive bottled water when tap water is readily available, there were many people who would rather buy “Official” Red Hat Linux in a box for US$50 rather than download it for free or buy unofficial CD copies for as little as US$2.
33. Here, even though he is talking about alternatives to Red Hat, Young seems to contradict his earlier Evian Water argument.
34. A list of projects that Red Hat supports can be found on the Red Hat “Open source development list” Web page (Red Hat–a).
35. Other founding members of the Open Invention Network include IBM, Novell, Philips, and Sony. More information can be found at the Open Invention Network Web site (http://www.openinventionnetwork.com/).
36. It may be noted, for instance, that Red Hat refers to itself as an open source company and not a free software company. See for example the Red Hat “Investor Relations” Web page (Red Hat–b). Also, as Bob Young has put it (Young, 1999), “...we are not ideological about licenses. We are comfortable with any license that provides us with control over the software we are using... .”
37. Bdale Garbee was the Debian project leader between April 2002 and April 2003. While his comment was not meant to be taken literally, it is not far from the truth.
38. The Debian project actually refers to its developers as “maintainers.” However, for the sake of consistency, we shall continue to use the term developers.
39. Actually, the figure for source lines of code includes both the work of the original or upstream authors, who in most cases are not Debian developers, and the work of Debian developers, which includes Debian–related scripts and patches necessary to adapt packages to Debian or to fix bugs, as well as Debian package management tools and installation software (Amor, et al., 2007, p. 5). It would therefore be more accurate to say that the US$10 billion figure represents the free software effort as a whole, or a good part of it at any rate, rather than just the Debian project’s effort.
40. As a now famous post by a MrNemesis on Slashdot.com put it (Krafft, 2005, p. 103): “Look, this is Debian. They don’t release things until you have to fire rockets at the thing to stop it from working.”
41. The canonical references are probably Eric Raymond (1999a) and Lerner and Tirole (2000). Other relevant works include Lakhani and Wolf (2005) and Rullani (2005). For a review about studies on motivations for contributing to free and open source projects, see Rossi (2004).
42. There are also signs that part of the slowness of admission may be due to administrative tardiness, as the blog posts by two Debian developers, Winnertz (2008) and Nussbaum (2008), suggest.
43. See for instance HP’s “Open Source and Linux from HP” Web page (http://h71028.www7.hp.com/enterprise/cache/599999-0-0-0-121.html) and the Debian project’s “Who’s using Debian?” Web page (http://www.debian.org/users/).
44. What constitutes good leadership is of course a topic in its own right. A pertinent study in this regard is O’Mahony and Ferraro (2007). This study focuses on the Debian project in an attempt to draw insights on leadership and governance which may be of relevance to communities engaged in the production and sharing of knowledge.
45. Quoted in Mishra (2007, p. 15). The full quote is, “Until the laws of thermodynamics are repealed, I shall continue to relate outputs to inputs — i.e., to believe in production functions.” See Paul A. Samuelson, 1972. Collected scientific papers, Cambridge, Mass.: MIT Press, p. 174.
46. Maddog Hall is currently Executive Director of Linux International, a non–profit organization of computer vendors who support and promote the GNU/Linux system (http://www.li.org/).
47. Maddog’s story comes up around 53 minutes into the interview (TWiT, 2007).
48. The painting is Michelangelo’s Creation of Adam. An image of the painting can be found in Wikipedia–c (http://en.wikipedia.org/wiki/The_Creation_of_Adam).
49. The story of Maddog’s Fijian encounter doesn’t end there, but we shall leave it to the reader to find out what happened next. Actually, the entire interview is well worth a listen, not only for Maddog’s entertaining anecdotes, but also for the insider’s perspective he provides on the computing industry and the early years of GNU/Linux.
50. On strictly philosophical grounds, it is possible to argue that while free software may be the ethically superior alternative, this does not by itself make non–free software unethical (notwithstanding the fact that a certain prominent non–free software company has been known to behave in an ethically questionable manner).
51. The name of the video is “Truth Happens.” It can be viewed or downloaded on the Red Hat Videos Web page (http://www.redhat.com/videos/).
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Paper received 30 May 2008; accepted 1 December 2008.
“Ubuntuism, commodification, and the software dialectic” by Mike Chege is licensed under a Creative Commons Attribution–Noncommercial–No Derivative Works 3.0 Unported License.
Ubuntuism, commodification, and the software dialectic
by Mike Chege
First Monday, Volume 13, Number 12 - 1 December 2008