This new introductory text-reader on theories of human nature features astutely edited primary source selections and the acclaimed, authoritative voice of Thomas F. Wall--author of two other successful Wadsworth titles, THINKING CRITICALLY ABOUT PHILOSOPHICAL PROBLEMS and THINKING CRITICALLY ABOUT MORAL PROBLEMS. ON HUMAN NATURE grows out of instructors' long held desire for a single volume that provides students of this subject with both readings and engaging commentary. Organized in a historical format that draws from Ancient Asian sources; many classical, medieval, and modern thinkers; and all the way up to contemporary minds such as Dennett and the Churchlands, this book provides students with a comprehensive and accessible introduction to age-old debate that is as crucial now in our technological and scientific age as it has ever been.