Donald Kagan's magisterial history of the Peloponnesian War is recognised as a landmark of classical scholarship. Now Kagan - one of the most respected classical historians in the world - turns his attention from one of the greatest conflicts in history to the author who so magnificently chronicled it: Thucydides, the first truly modern historian. This study offers readers a remarkable opportunity to experience one great historian engaging another across the centuries in a work that is at once an engrossing voyage of discovery and a moving tribute.