Sergei Bulgakov, born in Russia in 1871, was one of the principal Eastern theologians of the twentieth century. At the age of thirty he was appointed professor of political economy at the University of Kiev. After a crisis of faith, Bulgakov declared himself an unbeliever in 1888, but in a slow process he moved from Marxism to Idealism, and then from Idealism to a rediscovered Orthodoxy. By the time of the two Revolutions of 1917, Bulgakov was one of the best known Orthodox theologians in Russia. In 1918 he was ordained priest, and fled Moscow in danger of imminent arrest. Arriving in Paris in 1925 he was to live and work there until his death in 1944, his life inextricably bound up with the Russian theological institute, Saint-Serge, of which he was a founder member and subsequent professor, rector and dean. In this timely work, Aidan Nichols introduces the life and work of Bulgakov and provides a systematic presentation of his dogmatic theology. 'The present book has appeared at exactly the right moment. Alike in Russia and in the West, we are witnessing a veritable "Bulgakov renaissance" . . . this is the first comprehensive and systematic survey of his theology in English.' Bishop Kallistos of Diokleia 'As research on Bulgakov by Catholics and Protestants as well as Orthodox grows in volume, it is a great help to have this authoritative, comprehensive guide. I hope it will encourage further study and assimilation of one of the most searching and moving as well as one of the most complex of modern theological minds.' Dr Rowan Williams, Archibshop of Canterbury Aidan Nichols, OP, is an English Dominican of Blackfriars, Cambridge. He has written thirty books, chiefly on aspects of Catholic theology and theological history, but also on Eastern Orthodoxy and Anglicanism.