Based on an analysis of Russian, Iranian and British sources, the picture of the revolution in Iran of 1905-1911 was recreated. A feature of the work is that the author investigated the internal causes and development of protest movements and the reaction of opponents of the revolution and external forces to them. Unlike previous works by Soviet and foreign authors, Ivanov managed to reconstruct the events of 1905-1911 in sufficient detail, correcting many errors and inaccuracies in its coverage. Ivanov's study has not lost its significance and is the most detailed on the problem to date.