Going for a friend is a concern you to humans tell most almost every other animals due to the fact successful breeding is central so you’re able to natural solutions. Peahens choose being among the most glamorous peacocks, ladies elephant seals pick people who’ve already lured high harems, and even promiscuous chimpanzees get it done selection concerning the most other chimps having which they was promiscuous. One of mammals, however, people are in a tiny minority in a single essential means: for more than 95 % out of most other animals, family relations plans of men care of young ones was nonexistent (Geary 2000). Around the human societies, even in the event, everyone bond along with her during the ). Not absolutely all person mating occurs contained in this such as for example bonds; contained in this and you will round the societies, polygamous agreements try relatively prominent (Broude 1994). For the provided exactly how and exactly why people favor friends, ergo, a couple points are significant: (1) you will find variations and additionally universalities round the cultures, and (2) there is certainly a big difference between set of friends for brief-identity dating in the place of a lot of time-identity relationship.
The brand new conversation lower than begins with search and you may idea worried about proximal explanations, otherwise instant emotional leads to from companion selection (including lovely thinking in response so you’re able to watching an in-person attractive other), and you can goes through progressively more distal products (relationships change, social and you can historical things, and you may evolutionary history).