The focus on dominance in primate behaviour makes it easy to forget that there are also species out there in which the sexes co-exist and cooperate relatively peacefully. Pair-bonded tamarins and titi monkeys, for instance, share childcare between males and females. Titi monkeys don’t seem to have any kind of dominance hierarchy. In other monogamous species, such as gibbons and simiangs, male coercion of females is hardly seen.
