About the Author
W. D. Hamilton is a Royal Society Research Professor in the Department of Zoology at the University of Oxford. He is known throughout the world for his work on social evolution and sexual selection. He is a fellow of the Royal Society and a Foreign Honorary Member of the American Academy of Arts and Sciences. W.D. Hamilton, Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS. Tel. 01865-271166.