The Evolutionary Origins of Friendship
- 10 January 2012
- journal article
- review article
- Published by Annual Reviews in Annual Review of Psychology
- Vol. 63 (1), 153-177
- https://doi.org/10.1146/annurev-psych-120710-100337
Abstract
Convergent evidence from many species reveals the evolutionary origins of human friendship. In horses, elephants, hyenas, dolphins, monkeys, and chimpanzees, some individuals form friendships that last for years. Bonds occur among females, among males, or between males and females. Genetic relatedness affects friendships. In species where males disperse, friendships are more likely among females. If females disperse, friendships are more likely among males. Not all friendships, however, depend on kinship; many are formed between unrelated individuals. Friendships often involve cooperative interactions that are separated in time. They depend, at least in part, on the memory and emotions associated with past interactions. Applying the term “friendship” to animals is not anthropomorphic: Many studies have shown that the animals themselves recognize others' relationships. Friendships are adaptive. Male allies have superior competitive ability and improved reproductive success; females with the strongest, most enduring friendships experience less stress, higher infant survival, and live longer.Keywords
This publication has 101 references indexed in Scilit:
- Social and genetic interactions drive fitness variation in a free-living dolphin populationProceedings of the National Academy of Sciences of the United States of America, 2010
- Variation in oxytocin is related to variation in affiliative behavior in monogamous, pairbonded tamarinsHormones and Behavior, 2010
- Female chacma baboons form strong, equitable, and enduring social bondsBehavioral Ecology and Sociobiology, 2010
- Contingent cooperation between wild female baboonsProceedings of the National Academy of Sciences of the United States of America, 2010
- Social bonds between unrelated females increase reproductive success in feral horsesProceedings of the National Academy of Sciences of the United States of America, 2009
- Supply and demand determine the market value of food providers in wild vervet monkeysProceedings of the National Academy of Sciences of the United States of America, 2009
- Chimpanzees (Pan troglodytes) do not develop contingent reciprocity in an experimental taskAnimal Cognition, 2009
- Chimpanzees modify recruitment screams as a function of audience compositionProceedings of the National Academy of Sciences of the United States of America, 2007
- The limited impact of kinship on cooperation in wild chimpanzeesProceedings of the National Academy of Sciences of the United States of America, 2007
- True paternal care in a multi-male primate societyNature, 2003