Why does our society or any society function as it does? Many of the activities were established by social systems created in the past and are currently being maintained by the larger society. Other organized patterns of behavior seemed to have occurred spontaneously, without any specific organizing effort, but continue to control and govern behavior for very long periods of time. ? Why are certain animals used for domestic stock and not others? Why is the method of farming in China and India so different from farming in America and Europe? Why are there so many more people in Asia and India than in the rest of the world? Was there some guiding principle that determined which patterns of behavior would dominate? To understand these process one must first understand the layers of systems controlling our world.