Considered part of the “pulpit of the American Revolution,” and a leading advocate of the separation of church and state in Revolutionary-era America, Baptist pastor Isaac Backus was a pillar of early American evangelical thought. His works such as Appeal to the Public for Religious Liberty and Government and Liberty Described and Ecclesiastical Tyranny Exposed open a valuable window into early America and the development of the ideals of religious liberty.

Isaac Backus was an advocate of separating government and church, and ardent voice for the protection of religious liberty in early America. This, one of his most important treatises, defines and examines the role of government and the protection of freedom of religion, and the importance of separate churches.