Fascinating perspective that argues strongly for relocating social needs as the bedrock of Maslow's pyramid--a central fact of our lives, from the brain out, rather than optional "needs." Lieberman makes a slew of connections between social psychology, biology, economics and political science, full of familiar academic and cultural references. I hope in future research he looks at how wiring for sensitivity/insensitivity (both have complementary value to society) and introversion/extroversion (which are innate temperamental orientations) relate to larger findings about social needs and the benefits of orienting our cultural and economic structures to better meet those needs. It also poses questions for me about how natural inclinations towards collectivism are, and how much increasing rates of anxiety and depression are fueled by a culture/society that actively cuts off avenues for meeting social needs, particularly in the anti-collectivist US.