When biologists study cooperation in animals, they usually offer just a single task at a time. But what happens when animals can choose among several opportunities to work together? Biologists at ...

Animal communication is often imagined as something that happens within a species: birds calling to birds, monkeys warning monkeys, wolves signalling to wolves. But nature is more connected than that.

Last Friday, as I was competing a draft of this essay, I was asked to comment on the notion of trust among nonhuman animals (animals). This request couldn't have come at a better time because I was ...

Part I: Biological perspectives. The evolution of cooperation and altruism -- Competition and conflict in animals -- Animal communication -- Part II: Human social behaviour. Theory of voting -- ...