International Relations: concerns the relationships among the worlds governments
Collective goods problem: the problem of how to provide something that benefits all members of
a group regardless of what each member contributes to it.
Dominance: solves collective goods problem by establishing a power of hierarchy in which
those at the top control those below.
Reciprocity: solves the collective goods problem by rewarding behavior that contributes to the
group and punishing behavior that pursues self-interest at the expense of the group.
Identity: members of an identity community care about the interests of others in that community
enough to sacrifice the