This volume contains nineteen important essays related to the Greek historian Polybius by Professor F.W. Walbank, the recognized authority on the subject. The essays deal with Polybius as a historian, with his views on Rome and with many historical topics for which he is the principal source. A substantial introduction provides a critical account of work done on Polybius during the last twenty-five years. The book will be of special importance to students of Republican Rome and the Hellenistic world and also to anyone interested in historiography.