The social brain
With the brain size of monkeys, the potential size of the social group increases, as individuals with the larger brains can establish and maintain social relationships with a larger number of group members (Robin Dunbar).
The advantage of the larger social group and the advantage of greater contact ability lead to a selection of individuals and groups with the larger brains. Selection promotes brain growth, as confirmed by hominid fossils.
The brain is an expensive organ because it consumes a lot of energy that the living being has to provide. Why did it paid off in evolution to invest in large brains?Continue reading “269”