I like Hudons entry for 'Commons'
Commons: Publicly held land and other economic infrastructure in the public domain, such as water, land, radio airwaves, forests and air, and natural monopolies such as transportation, power and telephone service, to be organized in society’s overall long-term self-interest rather than monopolized by private-sector rentiers. The idea of an inherent “tragedy of the commons” resulting from overuse often is cited as the reason why this policy cannot work over time. However, that ideological position does not reflect historical reality. The commons traditionally have been treated with a view toward long-term preservation of social integrity and balance.