The Tragedy of the Commons is a type of social trap, often economic, that involves a conflict over resources between individual interests and the common good. It is a structural relationship between free access to, and unrestricted demand for, a finite resource. Such situations have occurred in the context of fishing (eg, the overfishing and destruction of the Grand Banks, and the destruction of salmon runs on rivers on which dams have been installed for power production), and in terms of water supply (eg, limited water available in arid regions as in the area of the Aral Sea, the Los Angeles water system supply, especially at Mono Lake and Owens Lake). The term derives originally from a comparison noticed by William Forster Lloyd with medieval village land holding in his 1833 book on population. It was then popularized and extended by Garrett Hardin in his 1968 Science essay "The Tragedy of the Commons."However, the theory itself is as old as Thucydides and Aristotle, the latter of whom said "that which is common to the greatest number has the least care bestowed upon it."

This social tragedy, how do we deal with it?
reducing population greatly was suggested. How do we go about doing that? Privatization?
any other solutions?