A major leader in the 16th-century Reformation of the Catholic Church, John Calvin established a new religion with strict codes of belief and behavior. Calvin taught the virtues of faith above good works and advanced the theory of universal priesthood, in which all Christians could practice their religion without the daily guidance of priests. Calvin also established the idea of the “Elect,” a preordained group of people whom God chooses for Salvation. Many Europeans embraced Calvinism; as his ideas spread, they sparked other Protestant religions.