Although cooperation is a widespread phenomenon in nature, human cooperation exceeds
that of all other species with regard to the scale and range of cooperative activities. Here we …

In any given species, cooperation involves prosocial acts that usually return a fitness benefit
to the actor. These acts are produced by a set of psychological rules, which will be similar in …

Cooperation is fundamental to human societies and widespread among animals, yet
explaining how cooperative relationships persist without one party exploiting another …

Behavioural innovations may have far-reaching evolutionary and ecological consequences,
allowing individuals to obtain new resources and cope with environmental change …

In cooperatively breeding birds, where helpers of both sexes assist with the provisioning and
upbringing of offspring who are not their own, males tend to contribute more than females to …

Although breeding success is known to increase with group size in several cooperative
mammals, the mechanisms underlying these relationships are uncertain. We show that in …

Cooperative behavior is a hallmark of the primate order. Cooperation is therefore an area of
intensive theoretical research in biology, anthropology, political sciences and economics, as …

In vertebrate societies where young are reared communally, nonbreeding helpers are
usually closely related to young but often vary widely in their contributions to feeding them …

Despite major evolutionary implications, patterns of social information transmission in
natural populations remain poorly understood. We used an experiment to examine the …

The evolution and expression of different forms of cooperative behaviour (eg feeding,
guarding, sentinel duties, etc.) are usually studied independently, with few studies …