Civilizations have laws because if laws or rules were non existent and anyone could do whatever they wanted the world would be in chaos. Anyone would be able to kill anyone, they could steal from other people, little kids could be drinking beer and taking drugs, people could injure eachother, people could build whatever they want and drivers wouldn't have to have a driver's liscence, they could get drunk and crash and they could speed and go through red lights. Though i also think laws should not be to strict, like Hammurabi's code, like if you hit your father your hand would be cut off, or probably people would just riot and still cause chaos. I thought tghat Hammurabi's code was not very fair, although i see reasoning in his laws.