Less famine, much more war. Population densities don't stay down on their own -- people can breed quite rapidly in good conditions. What happens is that population rises to the point where there is no longer enough food for everyone, and then territorial clashes start happening, until someone identifies a weak neighbor tribe and slaughters them. So everything is better until that week you're fighting for your life, and the life of everyone you know and love.
This is exactly how chimpanzees live today, and matches well with most of the archaeological remains we have of primordial hunter-gatherers. Our forebears lived very violent lives.
This is exactly how chimpanzees live today, and matches well with most of the archaeological remains we have of primordial hunter-gatherers. Our forebears lived very violent lives.