Engraving of an Egyptian pharaoh driving a chariot in battle North Wind Picture Archives / Alamy
Human societies have become incredibly big and complex over the past few thousand years, and they have done so primarily because of agriculture and warfare. That is the claim made by a large international collaboration that has spent more than a decade gathering data on the subject. But not everyone is convinced by these conclusions – or even by the starting assumptions.
The way we live today is very different from the way humans have lived for most of our history. For …
