This book, the second volume in Donald Kagan’s tetralogy about the Peloponnesian War, is a provocative and tightly argued history of the first ten years of the war. Taking a chronological approach that allows him to present at each stage the choices that were open to both sides in the conflict, Kagan focuses on political, economic, diplomatic, and military developments. He evaluates the strategies used by both sides and reconsiders the roles played by several key individuals.