Social Instinct: How Cooperation Shaped the World

Cooperation is the means by which life arose in the first place. It’s how life progressed through scale and complexity, from free-floating strands of genetic material to nation states. But given what we know about evolution, cooperation is also something of a puzzle. How does cooperation begin, when on a Darwinian level, all the genes in the body care about is being passed on to the next generation? Why do meerkats care for one another’s offspring? Why do babbler birds in the Kalahari form colonies in which only a single pair breeds? And how come some reef-dwelling fish punish each other for harming fish from another species?

A biologist by training, Raihani looks at where and how collaborative behavior emerges throughout the animal kingdom, and what problems it solves. She reveals that the species that exhibit cooperative behaviour most similar to our own tend not to be other apes; they are birds, insects, and fish, occupying far more distant branches of the evolutionary tree. By understanding the problems they face, and how they cooperate to solve them, we can glimpse how human cooperation first evolved. And we can also understand what it is about the way we cooperate that makes us so distinctive–and so successful.