The denomination grew very rapidly throughout the 19th and 20th centuries, becoming the largest Protestant denomination in the U.S. by the 1870s. After 1945 it began to expand outside the South, first to the western states then to the north. Patterson (1979) attributes the growth of Southern Baptists since the 18th century, apart from sociological, demographic, and cultural influences, to religious factors: | The denomination grew very rapidly throughout the 19th and 20th centuries, becoming the largest Protestant denomination in the U.S. by the 1870s. After 1945 it began to expand outside the South, first to the western states then to the north. Patterson (1979) attributes the growth of Southern Baptists since the 18th century, apart from sociological, demographic, and cultural influences, to religious factors: |