Indirect reciprocity is based on knowing the other player's reputation, which is the player's history with other players. Cooperation depends on a reliable history being projected from past partners to future partners. Network reciprocity relies on geographical or social factors to increase the interactions with nearer neighbors; it is essentially a virtual group. Group selectionHere group selection is not a form of evolution, which is problematical (see , ch. 7), but a mechanism for evolving cooperation. assumes that groups with cooperators (even altruists) will be more successful as a whole, and this will tend to benefit all members.
Indirect reciprocity is based on knowing the other player's reputation, which is the player:'s history with other players. Cooperation depends on a reliable history being projected from past partners to future partners. Network reciprocity relies on geographical or social factors to increase the interactions with nearer neighbors; it is essentially a virtual group. Group selectionHere group selection is not a form of evolution, which is problematical (see , ch. 7), but a mechanism for evolving cooperation. assumes that groups with cooperators: (even altruists) will be more successful as a whole, and this will tend to benefit all members.