Chapter 1 draws from A Cooperative Species: Human Reciprocity and its Evolution by Samuel Bowles and Herbert Gintis (Princeton University Press, 2011), pages 15–31 and 209–213. We are grateful to Princeton University Press for their permission to republish these pages.
Chapter 11 draws from The Bourgeois Virtues: Ethics for an Age of Commerce by Deirdre N. McCloskey (University of Chicago Press, 2006), pages 108–125. We are grateful to Professor McCloskey and the University of Chicago Press for their permission to republish these pages.