Natural law is the idea that our basic moral principles apply to every human being, and are accessible to human reason. Most people have assumed that since Judaism seems to consist of a specific historical revelation and a specific tradition, that an idea such as natural law is foreign to it. This book shows that natural law is part of Judaism, and that it is consistent with its specific revelation and tradition. In this book, not only is the history of an idea shown with great accuracy, but the idea of natural law is presented as a way of conveying some of Judaism's meaning for life today.