Nature's logic makes no qualitative judgments: earthquakes, disease, fire, and flood destroy human beings just as they also destroy irrational animals - without distinction. Decay, pain, panic, and death constitute the same conditions of existence for both Aristotle and his dog. Why? How is this irrationality compatible - how does it coexist - with the wonderful rationality (the wisdom and beauty) of nature? Why is the only consciousness in the universe, the creative uniqueness of each human being, a provocatively negligible given in nature's mechanistic functionality? And why do hatred, blind cupidity, sadism, and criminality spring from nature - why do they have roots in humanity's biostructure? Can we perhaps bring some logical order, some principles of understanding, to questions concerning the nature of evil? This book attempts to respond to the challenge.