Total Freedom by Jiddu Krishnamurti. A rationalist’s guide to the perils of the human mind. The “spiritual” book that I keep returning to. Sapiens by Yuval Noah Harari. A history of the human species, with observations, frameworks, and mental models that will have you looking at history and your fellow humans differently. Everything by Matt Ridley. Matt is a scientist, optimist, and forward thinker. Genome, The Red Queen, The Origins of Virtue, The Rational Optimist—they’re all great.