Concentrating on problems that commonly perplex general readers and beginning students, John Maynard Smith discusses fundamental issues in biology, with emphasis on evolution, development, and cognition. He provides a nontechnical account of molecular genetics, which is the foundation of modern biology, and explores such issues as heredity, animal behavior, the definition and origin of life, the brain and how we know things, artificial and natural intelligence, and genetics. The book is unique in presenting modern ideas in terms that can be understood without an in-depth knowledge of biology.