The construction of a religious philosophy of history is, apparently, the calling of Russian philosophical thought. Original Russian thought is addressed to the eschatological problem of the end, it is colored apocalyptically. This is the difference between it and the thought of the West. But this gives it primarily the character of a religious philosophy of history. I have always been particularly interested in the problems of the philosophy of history. The world war and revolution sharpened this interest and directed my studies mainly in this direction. I matured the plan of the book on the main problems of the religious philosophy of history, which was laid in the basis of lectures delivered in Moscow at the Free Academy of Spiritual Culture during the winter of 1919-1920.