This volume significantly broadens the scope of modern evolutionary biology by looking at the important and long-neglected concept of natural selection, in which sexual selection plays a complex role that has been little understood and is of great importance. In this classic book, which was the first full discussion of sexual selection since 1871, leading biologists bring modern genetic theory and behavior observation to bear on this subject. The distinguished authors consider many aspects of sexual selection in many species, including man, within the context of contemporary evolutionary theory and research.