This book of essays honors an extraordinary woman, Margaret Gruter, founder and president of the Gruter Institute for Law and Behavioral Research, which is dedicated to promoting a scientifically sound understanding of human nature, law and legal institutions. The number of disciplines represented by the contributors and their variety of approaches and insights reveal the wide appeal of Margaret Gruter's belief that biology and, in particular, evolutionary theory offer fertile grounds for scientists and law professors to engage fundamental questions about the nature of man and the role of law. These essays are both an excellent introduction to law and biology and a stimulating examination of its many facets.