In 1843, when Rabbi Menachem Mendel Schneersohn, third Lubavitcher Rebbe, was called upon to join the government's Rabbinical Commission in Czarist Russia, the Rebbe showed unswerving determination in opposing any changes to Jewish practice and custom, proposed by the Haskalah Movement.Penned by Rabbi Yosef Yitzchak Schneersohn, sixth Lubavitcher Rebbe, The Tzemach Tzedek and the Haskalah Movement presents the background and story of this critical period in Russian Jewish history.