One of the major Orthodox rabbis who helped shape the identity of Orthodox Judaism in America as we know it today. President of many national organizations, notably the only person to have served as President of the Rabbinical Council of America, the Synagogue Council of America, and the Union of Orthodox Jewish Congregations of America. One of the founders of the Jewish community center based around a synagogue. The organizer of the first nationwide kosher food endorsement under the O.U., and a major personality in the Vaad Hatzalah, rescuing Jews from the holocaust, and many other major Jewish organizations