The Chabad school, limited to its namesake dynasty, but prominent, was founded by Shneur Zalman of Liadi and was elaborated by his successors, until the late 20th century. The movement retained many of the attributes of early Hasidism, before a clear divide between Righteous and ordinary followers was cemented. Chabad "Rebbe"s insisted their adherents acquire proficiency in the sect's lore, and not relegate most responsibility to the leaders. The sect emphasizes the importance of intellectually grasping the dynamics of the hidden divine aspect and how they affect the human psyche; the very acronym Chabad is for the three penultimate "Sephirot", associated with the cerebral side of consciousness.