Contributions by: Kim Sterelny, Richard Joyce, Brett Calcott, Ben Fraser, Don Ross, Jessica C Flack, Doug Erwin, Tanya Elliott, David C. Krakauer, Hanna Kokko, Katja Heubel, Paul Seabright, Herbert Gintis, Ronald Noe, Bernhard Voelkl, Haim Ofek, Deborah M Gordon, Adam G Hart, Andrew Cockburn, Brian Skyrms, Simon Huttegger, Livio Riboli-Sasco, Sam P. Brown, Nicholas Shea, Cecilia Heyes, Fiery Cushman, Hugo Mercier, Felix Warneken, Joseph Henrich, Maciek Chudek, Wanying Zhao, Daniel Fessler, Katinka Quintelier, June Tangney, Jeffrey Stuewig, Elizabeth Malouf, Kerstin Youman, Daniel Kelly, Matteo Mameli