All you have to do is pick up a history or sociology book and you'll see things (records of laws carbon dated) from periods of history outlawing theft and murder long before the burning bush decided to light a fire under mosses' butt lol

As for your other question, Atheisn deals with peoples belief (or lackthereof) in the suprenatural....their economic political preferences can span the spectrum from Totalitarian to democratic....and their economic outlook likewise can go from command economies to market driven supply and demand....one has nothing to do with the other.

Perfection does not exist. The question therefore, is: what level of imperfection are we willing to settle for?