Christianity dating back to luther and calvin
These belief systems veer from the essential, historic Christian proper theological belief (Nature, Person of God, i.e the Trinity, Christological belief such as the person and work of Jesus Christ, Deity of Jesus, etc.
these doctrines are what categorise certain groups of being a cult and determine whether a group is to be included within the Biblical, historical Christian faith. The excluded groups named are mostly (if not entirely) based on the private interpretations of a charismatic leader or leaders, whereby the gods revealed by these “prophets” and “teachers” are wholly and completely different from the God of Christianity (despite having the same or similar names for their gods).
Scripture was also viewed as a unified whole, which led to a covenantal theology of the sacraments of baptism and the Lord's Supper as visible signs of the covenant of grace.
Another Reformed distinctive present in these theologians was their denial of the bodily presence of Christ in the Lord's supper.
In the twentieth century, Abraham Kuyper, Herman Bavinck, B. Nevertheless, the term first came out of Lutheran circles.
Calvin denounced the designation himself: Despite its negative connotation, this designation became increasingly popular in order to distinguish Calvinists from Lutherans and from newer Protestant branches that emerged later.
Each of these theologians also understood salvation to be by grace alone, and affirmed a doctrine of particular election (the teaching that some people are chosen by God for salvation).
Martin Luther and his successor Philipp Melanchthon were undoubtedly significant influences on these theologians, and to a larger extent later Reformed theologians.
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.
Calvinists broke from the Roman Catholic Church in the 16th century.