Synopsis

What confers intelligence upon an animal? What evolutionary pressures have shaped the development of more intricate brains? A growing number of scientists suggest the answer resides in social connection. Across the animal kingdom, some of the most ingenious creatures—humans included—tend to be those inhabiting complex social structures: dolphins, elephants, and apes, for instance. Could the cognitive demands of navigating relationships – distinguishing friend from foe – be a key driver of intell