In the past two decades, an explosion of research has generated many compelling insights--as well as hotly debated controversies--about the evolutionary bases of human nature. This important volume brings together leading proponents of different theoretical and methodological perspectives to provide a balanced look at 12 key questions at the core of the field today. In 43 concise, accessible chapters, followed by an integrative conclusion, the contributors present viewpoints informed by human behavioral ecology, evolutionary psychology, and gene-culture coevolutionary approaches. Topics include the strengths and limitations of different methodologies; metatheoretical issues; and debates concerning the evolution of the human brain, intellectual abilities, culture, and sexual behavior.