Table 1.

In the Prisoner’s Dilemma Game, if the player (Player 1 or Player 2) cooperates and the partner defects, the defector receives four rewards (individual maximizing solution) and the cooperator receives none.

		Player 2
		Cooperate	Defect
Player 1	Cooperate	3/3	0/4
	Defect	4/0	1/1

If both cooperate, each player receives three rewards (group maximizing solution), while if both defect, each player receives one reward.