Authors: Joseph Henrich; Richard McElreath; Abigail Barr; Jean Ensminger; Clark Barrett; Alexander Bolyanatz; Juan Camilo Cardenas; Michael Gurven; Edwins Gwako; Natalie Henrich; Carolyn Lesorogol; Frank Marlowe; David Tracer; John Ziker Journal: Science Date: 2006-06-23 Impact factor: 47.728