Excerpts from Books and Wikipedia
"Alexander II Nicolaevich, whom Bahá'u'lláh had commanded in His Tablet to "arise … and summon the nations unto God," who had been thrice warned: "beware lest thy desire deter thee from turning towards the face of thy Lord," "beware lest thou barter away this sublime station," "beware lest thy sovereignty withhold thee from Him Who is the Supreme Sovereign," was not indeed the last of the Czars to rule his country, but rather the inaugurator of a retrogressive policy which in the end proved fatal to both himself and his dynasty." [Shoghi Effendi, The Promised ay Is Come, paragraph 136]