Why Justice Systems Are Set Up

God set a mark onto kane, lest any finding him should kill him. You think, why in the world would god protect kan? Well, the next part of the story actually tells you that you have a family. Your brother kills my son, so what do i do? I come and i kill your father and your cousin. And then you think, well, i'm going to come back and i'm going to kill four your people. And then i come back and say, yes, no problem. It's sixteen of you this time. And then you come back and you say, 16, eh. Let's try for thirty two. And so this is what happens....