The ancient Greek historian Thucydides called it "a war like no other" -- arguably the greatest in the history of the world up to that time. The Peloponnesian War pitted Athens and her allies against a league of city-states headed by Sparta. Thucydides's eyewitness account of the war has been a classic for 24 centuries and is still studied for its profound truths about the nature of human strife. In The Peloponnesian War, Professor Kenneth Harl draws...