Ludwig Edelstein characterizes the idea of "progress" in Greek and Roman times. He analyzes the ancients' belief in "a tendency inherent in nature or in man to pass through a regular sequence of stages of development in past, present, and future, the latter stages being-with perhaps occasional retardations or minor regressions-superior to the earlier." Edelstein's contemporaries asserted that the Greeks and Romans were entirely ignorant of a belief in progress in this sense of the term. In arguing against this dominant thesis, Edelstein draws from the conclusions of scholars of the nineteenth...