I don't plan too far ahead, but I am going to finish the absolutely fascinating book A Natural History of Human Morality by Michael Tomasello. This is an exceptionally well researched book, full of citations, presenting a theory of how humans developed their sense of morality, from an evolutionary perspective.

I does so by contrasting our behavior with that of the great apes so that we can determine the characteristics of our common ancestor and then build a scenario for how we could have gone from there to here.

I'm about half-way through right now and I highly recommend it