Socinianism

Socinianism (pronunciation: /səˈsɪniːənizm/) is a system of Christian doctrine named for Fausto Sozzini (Latin: Faustus Socinus), which was developed among the Polish Brethren in the Minor Reformed Church of Poland during the 16th and 17th centuries and embraced by the Unitarian Church of Transylvania during the same period. It is most famous for its nontrinitarian Christology but contains a number of other unorthodox beliefs as well.

The ideas of Socinianism date from the element of the Protestant Reformation known as the Radical Reformation and have their root in the Italian Anabaptist movement of the 1540s, such as the Antitrinitarian Council of Venice in 1550. Lelio Sozzini was the first of the Italian Antitrinitarians to go beyond Arian beliefs in print and deny the pre-existence of Christ in his Brevis explicatio in primum Johannis caput – a commentary on the meaning of the Logos in John Chapter 1:1–15 (1562). Lelio Sozzini considered that the "Beginning" of John 1:1 was the same as 1 John 1:1 and referred to the new creation, not the Genesis creation. His nephew Fausto Sozzini published his own longer Brevis explicatio later, developing his uncle's arguments. Many years after the death of his uncle in Switzerland, Fausto Sozzini consulted with the Unitarian Church in Transylvania, attempting to mediate in the dispute between Giorgio Biandrata and Ferenc Dávid.

...
Wikipedia