John Calvin, a French theologian and lawyer, was a key figure in the Protestant Reformation outside of Germany. He experienced a conversion in the early 1530s and dedicated himself to reforming the Catholic Church. Calvin established a theocracy in Geneva where the Calvinist church closely governed citizens' personal and social lives. Calvin emphasized God's sovereignty and humanity's dependence on divine grace for salvation. Though people could never know with certainty their fate of salvation or damnation, Calvinism offered believers a sense of righteousness. Calvin's teachings on predestination and strict obedience to God's laws shaped Western culture and sparked revolutionary movements against perceived violations of divine authority.