By alone I mean who in the world will help you if you're a psychopathic killer who enjoys torturing animals and people? Who is the last person on the face of the earth who will not give up on you?

Your parents, that is if you have parents that love you this way. Many don't but many do.

Every single one of your other relationships relies on effort by you to maintain. If you violate certain societal norms all bets are off. All relationships are basically just mutual trade agreements except for the parent - child bond. It's a cynical world view but it's real, there are lines everywhere that you have to make efforts not to cross because you're aware that if those lines are crossed people will abandon you.