During the 1950s and 1960s, many economists were convinced that externalities were a cause of "market failures" -- because individuals are not capable of internalizing the costs their actions impose to others -- and therefore that the intervention of the state was necessary to allow an efficient...

Garrett Hardin’s “The Tragedy of the Commons” (1968) has been incredibly influential generally and within economics, and it remains important despite some historical and conceptual flaws. Hardin focused on the stress population growth inevitably placed on environmental resources....