In 1523 a papal appeal to Zürich to abandon Zwingli was answered by the canton's formal declaration of independence from the Catholic Church. Henceforth the revolt spread rapidly throughout Switzerland, except in the five forest cantons, the very heart of the country, where the ancient religion was still deeply intrenched. Serious efforts were made to join the followers of Zwingli with those of Luther, and thus to present a united front to the common enemy, but there seemed to be irreconcilable differences between Lutheranism and the views of Zwingli. The latter, which were succinctly expressed in sixty-seven Theses published at Zürich in 1523, insisted more firmly than the former on the supreme authority of Scripture, and broke more thoroughly and radically with the traditions of the Catholic Church. Zwingli aimed at a reformation of government and discipline as well as of theology, and entertained a notion of an ideal state in which the democracy would order human activities, whether political or religious. Zwingli differed essentially from Luther in never distrusting "the people." Perhaps the most distinctive mark of the Swiss reformer's theology was his idea that the Lord's Supper is not a miracle but simply a symbol and a memorial.
In 1531 Zwingli urged the Protestant Swiss to convert the five forest cantons to the new religion by force of arms. In answer to his entreaties, civil war ensued, but the Catholic mountaineers won a great victory that very year and the reformer himself was killed. A truce was then arranged, the provisions of which foreshadowed the religious settlement in the Germanies—each canton was to be free to determine its own religion. Switzerland has remained to this day part Catholic and part Protestant.
[Sidenote: Calvin]
By the sudden death of Zwingli, Swiss Protestantism was left without a leader, but not for long, because the more celebrated Calvin took up his residence in Geneva in 1536. From that time until his death in 1564 Calvin was the center of a movement which, starting from these small Zwinglian beginnings among the Swiss mountains, speedily spread over more countries and affected more people than did Lutheranism. In Calvinism, Catholicism was to find her most implacable foe.
John Calvin, who, next to Martin Luther, was the most conspicuous Protestant leader of the sixteenth century, was a Frenchman. Born of middle-class parentage at Noyon in the province of Picardy in 1509, he was intended from an early age for an ecclesiastical career. A pension from the Catholic Church enabled him to study at Paris, where he displayed an aptitude for theology and literature. When he was nineteen years of age, however, his father advised him to abandon the idea of entering the priesthood in favor of becoming a lawyer—so young Calvin spent several years studying law.
[Sidenote: Calvin in France]
It was in 1529 that Calvin is said to have experienced a sudden "conversion." Although as yet there had been no organized revolt in France against the Catholic Church, that country, like many others, was teeming with religious critics. Thousands of Frenchmen were in sympathy with any attempt to improve the Church by education, by purer morals, or by better preaching. Lutheranism was winning a few converts, and various evangelical sects were appearing in divers places. The chief problem was whether reform should be sought within the traditional Church or by rebellion against it. Calvin believed that his conversion was a divine call to forsake Roman Catholicism and to become the apostle of a purer life. His heart, he said, was "so subdued and reduced to docility that in comparison with his zeal for true piety he regarded all other studies with indifference, though not entirely abandoning them. Though himself a beginner, many flocked to him to learn the pure doctrine, and he began to seek some hiding-place and means of withdrawal from people."
[Sidenote: "The Institutes">[
His search for a hiding-place was quickened by the announced determination of the French king, Francis I, to put an end to religious dissent among his subjects. Calvin abruptly left France and found an asylum in the Swiss town of Basel, where he became acquainted at first hand with the type of reformed religion which Zwingli had propagated and where he proceeded to write a full account of the Protestant position as contrasted with the Catholic. This exposition,—The Institutes of the Christian Religion,—which was published in 1536, was dedicated to King Francis I and was intended to influence him in favor of Protestantism.
Although the book failed of its immediate purpose, it speedily won a deservedly great reputation. It was a statement of Calvin's views, borrowed in part from Zwingli, and in part from Luther and other reformers. It was orderly and concise, and it did for Protestant theology what the medieval writers had done for Catholic theology. It contained the germ of all that subsequently developed as Calvinism.