Garrett Hardin developed the concept of the Tragedy of the Commons. The basic concept is a giant pasture that is for everyone to have a piece of land and for the herdsman to have as many cattle a possible to sustain the land. This land should be able to maintain itself for quite a long time because of cattle dying as well as the population staying relatively stable. But at some point the population will begin growing and the herdsman will want to maximize their profits by having more cattle, which in return the land cannot sustain. The herdsman receives all the profit from adding one more animal to the pasture so the herdsman will eventually begin adding more cattle, but the overgrazing caused by that added animal will destroy the land making it uninhabitable for everyone. Thus you have the tragedy of the commons. For all the...