also by daniel lieberman The Story of the Human Body: Exercised Evolution, Health, and Disease The Evolution of the Human Head Why Something We Never Evolved to Do Is Healthy and Rewarding DANIEL E. LIEBERMAN PAntheon books new york Copyrighted Material Lieb_9781524746988_all_3p_r1.z.indd 2 7/8/20 7:01 PMLieb_9781524746988_all_3p_r2.z.indd 3 7/14/20 12:42 PM