Try reading "The Moral Animal" by Robert Wright.
That's a good one!
Also worth reading, in my opinion, are Michael Shermer's
The Science of Good and Evil and Daniel Dennett's
Darwin's Dangerous Idea: Evolution and the Meanings of Life.
"Der Mensch kann was er will; er kann aber nicht wollen was er will." (Man can do what he wills but he cannot will what he wills.) - Arthur Schopenhauer