The Hard-shell Baptist groups were particularly prevalent in Appalachia during the 19th century and continue to exist today. Hard-shell Baptists are loosely synonymous with Primitive Baptists and the multitude of sub-divisions thereof. In opposition to the Hard-shells, Missionary Baptist churches were formed and also continue to exist.
The religious indoctrination of young Abraham Lincoln occurred in Hard-shell Baptist churches, particularly Little Mount Separate Baptist and Little Pigeon Creek Baptist churches. As a consequence, Lincoln later maintained throughout his adult life the "doctrine of necessity" (viz., divine fatalism).