John Smyth was an English Anglican, Baptist, then Mennonite minister and a defender of the principle of religious liberty.

Baptists form a major branch of evangelical Protestantism distinguished by baptizing only professing Christian believers and doing so by complete immersion. Baptist churches generally subscribe to the doctrines of soul competency, sola fide, sola scriptura and congregationalist church government. Baptists generally recognize two ordinances: baptism and communion.