Hasidism, a movement many believed had passed its golden age, has had an extraordinary revival since it was nearly decimated in the Holocaust and repressed in the Soviet Union. Hasidic communities, now settled primarily in North America and Israel, have reversed the losses they suffered and are growing exponentially. With powerful attachments to the past, mysticism, community, tradition, and charismatic leadership, Hasidism seems the opposite of contemporary Western culture, yet it has thrived...