In his new preface E. O. Wilson reflects on how he came to write this book: how The Insect Societies led him to write Sociobiology, and how the political and religious uproar that engulfed that book persuaded him to write another book that would better explain the relevance of biology to the understanding of human behavior.

In his new Preface E.O. Wilson reflects on how he came to write this book: how "The Insect Societies" led him to write "Sociobiology," and how the political and religious uproar that engulfed that book persuaded him to write another book that would better explain the relevance of biology to the understanding of human behavior.