to keep the masses in check. without rules there would be anarchy until sort of "tribes" or groups of people formed into another society and then eventually there would be rules again. Rules are unavoidable, the devil you know may be better than the devil you dont know. Rules keep everything in check so people can live safe.

If people did not have rules. The world would create the biggest war that has hit the earth and blow it into smitherienes. Then their might be survivors that will create rules so this will never happen again. But this might happen.

check out this video http://www.youtube.com/watch?v=_NITwwUHwy4

pretty cool huh?