Fausto Paolo Sozzini, also known as Faustus Socinus, was an Italian theologian and philosopher who lived during the 16th century. He was a prominent figure in the Christian reformation movement and played a crucial role in shaping Unitarianism as a new religious movement. Synonyms for the name Fausto Paolo Sozzini include Faustus Socinus, Faustus Sozzini, and Fausto Socini. Though his teachings were contentious, they sparked discussions surrounding the value and limitations of human reason, the nature of God, and the importance of moral goodness in religious practice. Today, Sozzini is remembered as a significant thinker who shaped the course of Christian theology.