The drama of the commons
The "tragedy of the commons" is a central concept in human ecology and the study of the environment. It has had tremendous value for stimulating research, but it only describes the reality of human-environment interactions in special situations. Research over the past thirty years has helped clarify how human motivations, rules governing access to resources, the structure of social organizations, and the resource systems themselves interact to determine whether or not the many dramas of the commons end happily.