It certainly depends much on the regional setting. Humans pushed to the boundaries of landscapes which support their existence. If you are a hunter gatherer in

It certainly depends much on the regional setting. Humans pushed to the boundaries of landscapes which support their existence. If you are a hunter gatherer in fertile jungle setting you might make do with 2 or 3h per day of hunting or gathering. If you live further north or south or in more arid regions that might take more time.