A big hat-tip to Keith Hart, where you can go explore his ideas about the common wealth.
Want some online commons? Try Flickr’s The Commons public photo project. Or Savage Minds’ arguments for Open Access Open Source scholarly material. Or the Opensource Handbook of Neuroscience.
You can also read about the classic Science article by Garrett Hardin, The Tragedy of the Commons. And explore more broadly at OnTheCommons.org