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The commons is the cultural and natural resources accessible to all members of a society, including natural materials such as air, water, and a habitable earth. These resources are held in common, not owned privately. == Background == The term "commons" derives from the traditional English legal term of common land, also known colloquially as "Commons". However, while common land might have been owned collectively, by a legal entity, the crown or a single person, it was subject to different forms of regulated usage, such as grazing of livestock, hunting, lopping of foliage or collecting resins. In distinction, the term commons in modern economic theory has come to refer to the cultural and natural resources accessible to all members of a society, such as air, water, and a habitable earth. A failure (tragedy of the commons) was a widespread metaphor of early economics, which came up in the 18th centuries. Early econonomic writers and scientists were supporters of the British Agricultural Revolution and Land reform laws and were in favour of unified ownership of the land.〔 They tried to get rid of the traditional usage rights of the commoners and used the tragedy of the commons as a suitable metaphor. They quoted, among others, Aristotle's polemic against the Polis of Platon in the sense of “everybody's property is nobody's property” and respectively "the most common good is the least guarded". The conflict around the dissolution of the traditional commons played a watershed role in landscape development and cooperative land use patterns and property rights.〔The end of the commons as a watershed' The Age of Ecology, Joachim Radkau, John Wiley & Sons, 03.04.2014, p. 15 ff〕 Among others, pamphlets as of 1833 by William Forster Lloyd on herders overusing a shared parcel of land on which they are each entitled to let their cows graze became part of the common wisdom in economics. The same concept is sometimes called the "tragedy of the fishers", because fishing too many fish before or during breeding could cause stocks to plummet.〔Samuel Bowles: Microeconomics: Behavior, Institutions, and Evolution, Princeton University Press, pp. 27–29 (2004) ISBN 0-691-09163-3〕 According Joachim Radkau, the alleged failure of the commons in the early economic literature and the status and functionality of the actual commons (or "Allmende")〔Radkau, Joachim. (2008). Nature and Power, A Global History of the Environment, p. 72〕 did not correspond at all. While the commons tragedy was used as means for the enclosure movement and the clearances and in general to get rid of collective rights in favor of private property, the actual commons or "Allmende" provided no signs of an uncontrollable failure at all.〔 As well, Elinor Ostrom found the tragedy of the commons not as prevalent or as difficult to solve. She and her coworkers looked at how real-world communities manage communal resources, such as fisheries, land irrigation systems, and farmlands, and they identified a number of factors conducive to successful resource management. One factor is the resource itself; resources with definable boundaries (e.g., land) can be preserved much more easily. A second factor is resource dependence; there must be a perceptible threat of resource depletion, and it must be difficult to find substitutes. The third is the presence of a community; small and stable populations with a thick social network and social norms promoting conservation do better. A final condition is that there be appropriate community-based rules and procedures in place with built-in incentives for responsible use and punishments for overuse. Locals have often come up with solutions to the commons problem themselves; when the commons is taken over by non-locals, those solutions can no longer be used.〔(【引用サイトリンク】title=Ostrom 'revisits the commons' in 'Science' )〕 Robert Axelrod contends that even self-interested individuals will often find ways to cooperate, because collective restraint serves both the collective and individual interests. Today, the commons are also understood within a cultural sphere. These commons include literature, music, arts, design, film, video, television, radio, information, software and sites of heritage. The crowdsourcing movement and among others Wikipedia are examples of the production and maintenance of common goods by certain communities in the form or videos, music, or encyclopedic knowledge that can be freely accessed by anyone without a central authority.〔Huberman, Bernardo A. and Romero, Daniel M. and Wu, Fang, Crowdsourcing, Attention and Productivity (September 12, 2008). 〕 Tragedy in the Wiki-Commons is avoided among others by community control and trading status and attention of individual authors within the Wikipedia community.〔Avoiding Tragedy in the Wiki-Commons, by Andrew George, 12 Va. J.L. & Tech. 8 (2007)〕 Economist Peter Barnes has proposed a 'sky trust' to fix this problem in the generic commons. He claims that the sky belongs to all the people, and companies do not have a right to over pollute. It is a type of cap and dividend program. Ultimately the goal would be to make polluting excessively more expensive than cleaning what is being put back into the atmosphere. The information commons may protect the community. Companies that pollute the environment release information about what they are doing. The Corporate Toxics Information Project〔(【引用サイトリンク】url=http://www.peri.umass.edu/Corporate-Toxics.298.0.html )〕 and information like the Toxic 100, a list of the top 100 polluters, helps people know what these corporations are doing to the environment. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「commons」の詳細全文を読む スポンサード リンク
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