High Quality Content by WIKIPEDIA articles! The Rabbinical Council of America (RCA) is one of the world's largest organizations of Orthodox rabbis; it is affiliated with The Union of Orthodox Jewish Congregations of America, more commonly known as the Orthodox Union, or OU. Most rabbis of the RCA belong to Modern Orthodox Judaism. The roots of the organization go back to 1923 when it was founded as the Rabbinical Council of the Union of Orthodox Jewish Congregations of America. Its purpose was to perpetuate and promote Orthodox Judaism in the United States of America. Its members attempted on a number of occasions to merge with other Jewish groups, for the purpose of developing a unified traditional rabbinate for the American Jewish community. A number of attempts were made to join with groups such as Agudat Israel, but all such attempts were rebuffed.