Acknowledgments

Thanks for everything to my editors, Rick Kot, Drummond Moir, Alban Miles, and Ravi Mirchandani, and to my agents, Katinka Matson and John Brockman.

For reading the entire book in draft form, and giving very useful feedback, very special thanks to: Rosalind Arden, Henry Baker, Jaime Confer, Chris Eppig, Carolyn Miller, Frank Miller, Daniel Nettle, Lars Penke, Carin Perilloux, Catherine Salmon, Andrew Shaner, Jill Sundie, Joshua Tybur, and Michael Wewerka.

For giving helpful feedback on particular sections of the book, thanks to: Nelson Amaral, Atalanta Arden-Miller, John Baker, Richard Baker, Michael Church, Dylan Evans, Vladas Griskevicius, Ori Heffetz, Mia Kersting, Emily Maple, Leslie Merriman, Gad Saad, Randy Thornhill, and Rhiannon West.

Thanks to the many other friends, colleagues, researchers, relatives, and students who have discussed or corresponded about this book’s ideas with me over the past decade, including: Paul Andrews, Tim Bates, Susan Blackmore, Jim Boone, David Buss, David Byrne, Ann Caldwell, Richard Conniff, Helena Cronin, Oliver Curry, David DeAngelo, Ian Deary, Damon DeLaszlo, Denis Dutton, Vince Egan, Rachael Falcon, Robert Frank, David Funder, Steve Gangestad, John Gardner, Glenn Geher, Gerd Gigerenzer, Dan Goldstein, Oliver Goodenough, Linda Gottfredson, David Hall, Richard Harper, Martie Haselton, Paul Hooper, Nicholas Humphrey, Chris Jenkins, Satoshi Kanazawa, Hilly Kaplan, Anat Keinan, Matt Keller, Douglas Kenrick, Rebecca LeBredonchel, Andrea Levine, Gary McGovney, Zack Mendenhall, Ravi Mirchandani, Randy Nesse, Michael Norton, David O’Hanlon, John Orbell, Nando Pelusi, Steven Pinker, Matt Ridley, Andrew Shaner, Aubrey Sheiham, Catherine Randall, Peter Singer, Walter Sinnott-Armstrong, Ilanit Tal, Andy Thompson, Peter Todd, Paul Watson, Richard Webb, Ian Wedde, and Ron Yeo.