Seventy-one years ago—Shevat 10 on the Jewish calendar—upon the passing of the sixth Lubavitcher Rebbe, Rabbi Yosef Yitzchak Schneersohn, of righteous memory, leadership of the Chabad-Lubavitch movement passed on to his illustrious son-in-law, Rabbi Menachem Mendel Schneerson, of righteous memory. In the decades that followed, the Rebbe revolutionized, inspired and guided the post-Holocaust transformation of the Jewish people that continues to this day.