Final answer:
In Switzerland, the Protestant Reformation was marked by the efforts of Ulrich Zwingli in Zurich and John Calvin in Geneva. Zwingli's reforms led to the Swiss Brethren and the Anabaptist movement, while Calvin's teachings on predestination spread widely, influencing Protestant thought in Europe and leading to religious conflicts and wars.
Step-by-step explanation:
Protestant Reformation in Switzerland
The Protestant Reformation in Switzerland unfolded with key figures such as Ulrich Zwingli and John Calvin pioneering drastic changes. In Zurich, Zwingli, a former priest, challenged Catholic doctrines such as transubstantiation, clerical celibacy, and proposed reforms including the removal of religious imagery and the use of German instead of Latin for the Bible. He was eventually killed in a conflict between Catholic and Protestant cantons of Switzerland. Subsequently, Konrad Grebel and the Swiss Brethren, influenced by Zwingli, advocated for adult baptism, forming a branch of the Anabaptist movement that rejected infant baptism and insisted on voluntary membership of the church by the faithful.
Elsewhere in Switzerland, particularly Geneva, John Calvin established a strict Protestant community. Calvin introduced the concept of predestination, which contrasted with other Protestant teachings. His followers, known as Calvinists, spread his doctrine internationally, including to the Netherlands, Scotland, France, and England, creating distinct Protestant traditions in those regions. The spread of Protestantism in Europe led to periods of both peaceful transition and violent conflict between adherents of the old Catholic faith and the new Protestant sects.