From such a conception of the continuity of history, the real significance of our study can be derived. It becomes perfectly clear that if we understand the present we shall be better prepared to face the problems and difficulties of the future. But to understand the present thoroughly, it becomes necessary not only to learn what are its great features and tendencies, but likewise how they have been evolved. Now, as we have already remarked, six most important characteristics of the present day have been developed within the last four or five centuries. To follow the history of this period, therefore, will tend to familiarize us both with present-day conditions and with future needs. This is the genuine justification for the study of the history of modern times. Modern history may conveniently be defined as that part of history which deals with the origin and evolution of the great distinguishing characteristics of the present. No precise dates can be assigned to modern history as contrasted with what has commonly been called ancient or medieval. In a sense, any division of the historical stream into parts or periods is fundamentally fallacious: for example, inasmuch as the present generation owes to the Greeks of the fourth century before Christ many of its artistic models and philosophical ideas and very few of its political theories, the former might plausibly be embraced in the field of modern history, the latter excluded therefrom. But the problem before us is not so difficult as may seem on first thought. To all intents and purposes the development of the six characteristics that have been noted has taken place within five hundred years. The sixteenth century witnessed the true beginnings of the change in the extensive world discoveries, in the establishment of a recognized European state system, in the rise of Protestantism, and in the quickening of intellectual activity. It is the foundation of modern Europe. The sixteenth century will therefore be the general subject of Part I of this volume. After reviewing the geography of Europe about the year 1500, we shall take up in turn the _four_ factors of the century which have had a lasting influence upon us: (1) socially and economically--The Commercial Revolution; (2) politically--European Politics in the Sixteenth Century; (3) religiously and ecclesiastically--The Protestant Revolt; (4) intellectually--The Culture of the Sixteenth Century. ADDITIONAL READING