Menachem Mendel Schneerson, known to adherents of the Chabad-Lubavitch movement as the Lubavitcher Rebbe or simply the Rebbe, was an Orthodox rabbi and the most recent Rebbe of the Lubavitch Hasidic dynasty. He is considered one of the most influential Jewish leaders of the 20th century.

Chabad, also known as Lubavitch, Habad and Chabad-Lubavitch, is an Orthodox Jewish Hasidic dynasty. Chabad is one of the world's best-known Hasidic movements. It is one of the largest Hasidic groups as well as one of the largest Jewish religious organizations in the world. Unlike most Haredi groups, which are self-segregating, Chabad mainly operates in the wider world and it caters to secularized Jews.