Original: See his famous sermon, "Unitarian Christianity" in The Works of W.E. Channing, D.D (1841) 19th century Unitarians often claimed Isaac Newton, but his Arian ideas predate Unitarianism.
Simplified: See his famous sermon, "Unitarian Christianity" in The Works of W.E. Channing, D.D (1841) Since the 19th century, several Evangelical or Revivalist movements also used an elevated subordinationist theology.