Dr. Rabbi Irving (Yitz) Greenberg is the founder and former president of Clal, the former president of the Jewish Life Network and the rabbi emeritus of the Riverdale Jewish Center. Greenberg was ordained at Yeshiva Beis Yosef and earned his M.A. and Ph.D. from Harvard University. He is the author of, The Jewish Way, For the Sake of Heaven and Earth, and "Covenantal Pluralism".