Other animals, like the social mammals -- the wolves, the elephants, the dolphins, the chimpanzees -- they can cooperate much more flexibly, but they do so only in small numbers, because cooperation among chimpanzees is based on intimate knowledge, one of the other.
Druge životinje, poput društvenih sisavaca -- vukova, slonova, dupina, čimpanzi -- one mogu surađivati puno fleksibilnije, ali to čine samo u malim brojevima, jer se suradnja među čimpanzama temelji na bliskom međusobnom poznanstvu.