Publisher Summary This chapter discusses the current knowledge of competition and
cooperation in wild chimpanzees. It explicitly focuses on recent field studies that shed new …

Coalitionary support in agonistic interactions represents cooperation because intervening in
a fight is potentially costly to the donor of support but benefits the recipient. Here, we first …

Coalitionary aggression occurs when at least two individuals jointly direct aggression at one
or more conspecific targets. Scientists have long argued that this common form of …

This comprehensive introductory text integrates evolutionary, ecological, and demographic
perspectives with new results from field studies and contemporary noninvasive molecular …

Controversy exists regarding the nature of primate social relationships. While individual
primates are frequently hypothesized to form enduring social bonds with conspecifics, recent …

Unlike humans, who came down from the trees and developed bipedal locomotion,
chimpanzees have remained in the original habitat of our ancestors: the tropical rainforests …

The complex cooperative behavior exhibited by wild chimpanzees generates considerable
theoretical and empirical interest, yet we know very little about the mechanisms responsible …

The notion of animal culture has been well established mainly through research aiming at
uncovering differences between populations. In chimpanzees (Pan troglodytes verus) …

In most male mammals, fitness is strongly shaped by competitive access to mates, a non-
shareable resource. How, then, did selection favor the evolution of cooperative social …

Social relationships in nonhuman primates result from investments that individuals make
while pursuing fitness-maximizing strategies. These strategies sometimes include social …