1. Darwin and the puzzle of primogeniture

   • Sarah Blaffer Hrdy
   • Debra S. Judge

   OriginalPaper Pages: 1 - 45

2. The evolution of sexuality in chimpanzees and bonobos

   • Richard W. Wrangham

   OriginalPaper Pages: 47 - 79

3. Cultivating male allies

   • Bonnie Lori Hooks
   • Penny Anthon Green

   OriginalPaper Pages: 81 - 107