Holding the No. 1 spot for a second year, Krinsky represents the fastest-growing denomination in Judaism, The Chabad-Lubavitch movement – a branch of Hasidism that reaches out assertively to Jews of all stripes and often cultivates the financial support and loyalty of Jewish men enticed by the suggestion of private Torah study. Krinsky doesn’t try to replicate the Messianic presence of his late predecessor and mentor, Menachem Mendel Schneerson, but he has brought a professionalism and managerial rigor to Chabad, which has been watched (and even quietly envied and emulated) by other denominations that would like to capture some of its magic outreach. (2010 ranking: #1)