John Calvin was born in Noyon, France, in 1509, the son of a church administrator who initially directed his studies toward theology and later toward law. He received a rigorous humanist education at Paris and Orléans, and his early training in close textual reading shaped the exegetical precision that would mark everything he later wrote. A conversion experience he described as sudden drew him decisively toward the reforming movement, and by his mid-twenties he had left France under threat of persecution, eventually settling in Geneva after a detour through Basel.
Geneva in the sixteenth century was a city caught between competing political factions and uncertain religious loyalties, and Calvin's time there was far from serene. He was expelled once, spent years in Strasbourg under Martin Bucer's influence, and returned to Geneva in 1541 to spend the remainder of his life shaping its church, its academy, and its governance. His relationship with the city was often contentious; the execution of Michael Servetus in 1553 remains the most difficult episode in his biography and resists easy explanation or dismissal.
Calvin's theological contribution rests above all on the *Institutes of the Christian Religion*, first published in 1536 and expanded through several editions until 1559. The work brought systematic order to Reformed doctrine, treating the sovereignty of God, human depravity, election, and the nature of the church with unusual logical rigor. Alongside the *Institutes*, his commentaries covered nearly the whole of Scripture and remained standard references for Protestant preachers for generations. His understanding of the Lord's Supper — neither Zwingli's memorialism nor Luther's physical presence, but a genuine spiritual feeding through faith — helped define a distinct Reformed sacramental theology.
Calvin died in Geneva in 1564, having shaped not only Swiss and French Protestantism but the broader Reformed tradition that took root in the Netherlands, Scotland, England, and eventually the New World.