@samr,
Stupid, stupid, stupid . . . if you have a social contract, it's not anarchy. I suggest you read Thomas Hobbes'
Leviathan, in which he has a lengthy discussion of the origins of society and government. I'm not saying he is right about all of it, but he raises some interesting points, such as that about the war of all against all. That's what true anarchy would be, and the devil take the hindmost.