who came up with separation of church and state
Separation of church and state An important contributor to the discussion concerning the proper relationship between Church and state was St. Augustine, who in The City of God, Book XIX, Chapter 17, examined the ideal relationship between the "earthly city" and the "city of God". In this work, Augustine posited that major points of overlap were to be found between the "earthly city" and the "city of God", especially as people need to live together and get along on earth. Thus, Augustine held that it was the work of the "temporal city" to make it possible for a "heavenly city" to be established on earth.[4]