There are two other populous Hasidic sub-groups, which do not function as classical "Rebbe"-headed "courts", but as de-centralized movements, retaining some of the characteristics of early Hasidism. Breslov rose under its charismatic leader Nachman of Breslov in the early 19th century. Critical of all other "Rebbes", he forbade his followers to appoint a successor upon his death in 1810. His acolytes led small groups of adherents, persecuted by other Hasidim, and disseminated his teachings. The original philosophy of the sect elicited great interest among modern scholars, and that led many newcomers to Orthodox Judaism ("repentants") to join it. Numerous Breslov communities, each led by its own rabbis, now have thousands of full-fledged followers, and far more admirers and semi-committed supporters; Marcin Wodziński estimated that the fully committed population of Breslovers may be estimated at 7,000 households. Chabad-Lubavitch, originating in the 1770s, did have hereditary leadership, but always stressed the importance of self-study, rather than reliance on the Righteous. Its seventh, and last, leader, Menachem Mendel Schneerson, converted it into a vehicle for Jewish outreach. By his death in 1994, it had many more semi-engaged supporters than Hasidim in the strict sense, and they are still hard to distinguish. Chabad's own internal phone-books list some 16,800 member households. None succeeded Schneerson, and the sect operates as a large network of communities with independent leaders.