Form of 17th-century Christian belief which rejects such traditional doctrines as the Trinity and original sin, named after Socinus, the Latinized name of Lelio Francesco Maria Sozzini (1525-62), Italian Protestant theologian. It is an early form of Unitarianism. His views on the nature of Christ were developed by his nephew, Fausto Paolo Sozzini (1539-1604), who also taught pacifist and anarchist doctrines akin to Tolstoy's. Socinianism denies the divinity of Jesus but emphasizes his virtues.