Strongly recommend:
The Better Angels of Our Nature: Why Violence Has Declined Steven Pinker
You've likely heard of this; if you haven't you absolutely must at least watch bis TED talk or find an article summary. I'll add my high recommendation.
Weakly recommend:
The ancestor's tale Richard Dawkins
I got what I wanted from this, which was better knowledge of the phylogenetic tree. Still, it wanders around quite a lot, and it makes it seem like he doesn't really understand the probability models being used for the sequence-based evidence that's challenging a lot of the old assumptions.
Micro-motives and macro-behaviour Thomas Schelling
I really only bought this because The Art of Strategy wasn't in the Kindle store. It's an okay set of game theory/group dynamics teasers to sharpen your intuition, but far from essential.
This is the monthly thread for posting media of various types that you've found that you enjoy. I find that exposure to LW ideas makes me less likely to enjoy some entertainment media that is otherwise quite popular, and finding media recommended by LWers is a good way to mitigate this. Post what you're reading, listening to, watching, and your opinion of it. Post recommendations to blogs. Post whatever media you feel like discussing! To see previous recommendations, check out the older threads.
Rules: