Jack J. Cohen (1919-2012) was a Reconstructionist rabbi, educator, and philosopher. Born in Brooklyn, New York, he graduated from Brooklyn College, was ordained by the Jewish Theological Seminary of America, where he later taught, and received a PhD in Philosophy of Education from Columbia University. A leading student of Rabbi Mordecai M. Kaplan, the founder of the Reconstructionist Movement, Rabbi Cohen served as the rabbi of the Society for the Advancement of Judaism, the synagogue established in New York by Rabbi Kaplan. Later, Rabbi Cohen moved to Israel, where he was a founder of a Reconstructionist congregation in Jerusalem and served for more than two decades as director of the Hillel Foundation at the Hebrew University.