Twentieth-century Russian philosophy opens with the resurgence of religious currents of thought that, since the time of the early Slavophiles, had been isolated in the theological academies. Such thinkers as Fyodorov and Solovyov made religious philosophy once again academically and culturally acceptable in Russia, and their efforts were continued by the Russian philosophers in exile, among whom Berdyaev, Shestov, Frank, and Lossky are the most...