I've been re-watching Season 5 now that it is On-Demand and the character of Martin "I used to go to church. I used to watch football on Sundays" made some good points. In his conversation with Tyreese, "You won't make it. You're the kind of guy who saves babies." and "all the good people are dead" he informs us that the world was once wolves and sheep. All the sheep are gone. Only wolves remain.
If you think about the character of Rick Grimes, his only goal is to keep his children alive. Nothing else matters. If your children have to starve so mine can eat, if your children have to die so mine can live, that's just too bad. Of course, every other person you run across will have the same goal. That's the world they live in now.
Nailed it.
A quote from another FReeper: The liberal is the child. All things are new, all things are possible. All is kindness and lovable little puppies. The Conservative is the father who whispers in the childs ear that most things have been tried, possibilities have problems, kindness is expensive and lovable little puppies may turn into mean ugly dogs. FReeper Captain Compassion