Nowak, M. A., May, R. M., & Sigmund, K. (1995, June). The arithmetics of mutual help. Scientific American, 272, 76-81.

Reports on computer experiments which show how cooperation rather than exploitation can dominate in the Darwinian struggle for survival. Sociobiologist Robert L. Trivers' use of the game theory known as Prisoner's Dilemma which highlight the difference between what is best from an individual point of view and from that of a collective.