They buried their dead and left offerings, in the belief that life extended beyond death. These people produced art and decorated cave walls with paintings of animals and hunting scenes. They could make lifelike clay models. All of this art was related to their social organization and their religious beliefs. Dependence on hunting meant a precarious lifestyle.
Animals can mysteriously disappear, leaving people to face death by starvation.
Over time people began to settle in one place and gave up their nomadic lives gradually. B.C. Over time agriculture was introduced. For thousands of years nomads in the Nile Valley planted wheat and barley in the silt left by the Nile, without giving up their nomadic way of life. A nomadic life dependent on wild plants and animals for food required a large amount of territory. As populations grew, eventually group territories began to bump into each other.