Biblical unitarianism (also capitalized as biblical Unitarianism, BU) encompasses the key doctrines of nontrinitarian Christians who affirm the Bible as their sole authority, and from it base their beliefs that God the Father is one singular being, and that Jesus Christ is God's son but not divine. The term "biblical Unitarianism" is connected first with Robert Spears and Samuel Sharpe of the Christian Life magazine in the 1880s. It is a neologism (or retronym) that gained increasing currency in nontrinitarian literature during the 20th century as the Unitarian churches moved away from mainstream church traditions and, in some instances in the United States, towards merger with Universalism. It has been used since the late 19th century by conservative Christian Unitarians, and sometimes by