Conflict is an integral, and potentially disruptive, element in the li
ves of humans and other group-living animals. But conflicts are often
settled, sometimes within minutes after the altercation has ended. The
goal of this paper is to understand why primates, including humans, m
ake amends. Primatologists have gathered an impressive body of evidenc
e which demonstrates that monkeys and apes use a variety of behavioral
mechanisms to resolve conflicts. Peaceful post-conflict interactions
in nonhuman primates, sometimes labeled ''reconciliation,'' have clear
and immediate effects upon former adversaries, relieving uncertainty
about whether aggression will continue, reducing stress, increasing to
lerance, and reducing anxiety about whether aggressors will resume agg
ression toward former victims. However, the long-term effects of these
interactions are less clearly established, leaving room to debate the
adaptive function of conflict resolution strategies among primates. I
t is possible that reconciliatory behavior enhances the quality of val
ued, long-term social relationships or that reconciliatory interaction
s an signals that the conflict has ended and the actor's intentions ar
e now benign. Both of these hypotheses may hi lp us to understand how
and why monkeys, apes, and humans make amends.