is the transformation of customs produced by the augmentation of wealth, of expenditure, and of needs,—a phenomenon, therefore, of psychological order, and one common in contemporary life. This lecture should show that my work does not belong among those written after the method of economic materialism, for I hold that the fundamental force in history is psychologic and not economic.
The three following lectures, "The History and Legend of Antony and Cleopatra," "The Development of Gaul," and "Nero," seem to concern themselves with very different subjects. On the contrary, they present three different aspects of the one, identical problem—the struggle between the Occident and the Orient—a problem that Rome succeeded in solving as no European civilisation has since been able to do, making the countries of the Mediterranean Basin share a common life, in peace. How Rome succeeded in accomplishing this union of Orient and Occident is one of the points of greatest interest in its history. The first of these three lectures, "Antony and Cleopatra," shows how Rome repulsed the last offensive movement of the Orient against the Occident; the second, "The Development of Gaul," shows
