It is the largest and perhaps one of the most conservative and orthodox of the Baptist churches. The Southern Baptist heritage is more Calvinist and, at the same time, more evangelical. Its International Mission Board is one of the most active in the nation. The term Southern is a misnomer because its members are found throughout the country and its North American Mission Board has missionaries in all 50 states. United Baptist. A merger of several groups of Separate and Regular Baptists, some of