During the English Civil War, the Calvinistic Puritans produced the Westminster Confession, which became the confessional standard for Presbyterians in the English-speaking world.
Having established itself in Europe, the movement continued to spread to other parts of the world including North America, South Africa, and Korea.
In Switzerland, some cantons are still Reformed and some are Catholic.
The remainder of the 16th century saw an explosion of confessional activity.The stability and breadth of Reformed theology during this period stand in marked contrast to the bitter controversy experienced by Lutherans prior to the 1579 Formula of Concord.Calvinism (also called the Reformed tradition, Reformed Christianity, Reformed Protestantism, or the Reformed faith) is a major branch of Protestantism that follows the theological tradition and forms of Christian practice of John Calvin and other Reformation-era theologians.Calvinists broke from the Roman Catholic Church in the 16th century.Calvinism differs from Lutherans on the real presence of Christ in the Eucharist, theories of worship, and the use of God's law for believers, among other things.
As declared in the Westminster and Second Helvetic confessions, the core doctrines are predestination and election. Keller, John Piper, David Wells, and Michael Horton.The doctrine of justification by faith alone was a direct inheritance from Luther.John Calvin (1509–64), Heinrich Bullinger (1504–75), Wolfgang Musculus (1497–1563), Peter Martyr Vermigli (1500–62), and Andreas Hyperius (1511–64) belong to the second generation of Reformed theologians.The protestant part of this reformation was considering that the Bible be interpreted by itself, meaning the parts that are harder to understand are examined in the light of other passages where the Bible is more explicit on the matter. Reformed churches may exercise several forms of ecclesiastical polity; most are presbyterian or congregationalist, though some are episcopalian.The term Calvinism can be misleading, because the religious tradition which it denotes has always been diverse, with a wide range of influences rather than a single founder. Calvinism is largely represented by Continental Reformed, Presbyterian, and Congregationalist traditions.This and the Belgic Confession were adopted as confessional standards in the first synod of the Dutch Reformed Church in 1571.