There is no agreement on how Christianity managed to spread so successfully prior to the Edict of Milan and the establishment of Christianity as the state religion of the Roman Empire.
In The Rise of Christianity, Rodney Stark argues that Christianity triumphed over paganism chiefly because it improved the lives of its adherents in various ways.
Christianity expanded throughout the world and became the world's largest religion due to European colonialism.
During its early history, Christianity grew from a 1st-century Jewish following to a religion that existed across the entire Greco-Roman world and beyond.
The history of Christianity concerns the Christian religion, Christendom, and the Church with its various denominations, from the 1st century to the present.
Roman Catholic and Eastern Orthodox Christianity spread to all of Europe in the Middle Ages.
Each Christian community also had presbyters, as was the case with Jewish communities, who were also ordained and assisted the bishop.
According to the New Testament, Christians were subject to various persecutions from the beginning.
This involved even death for Christians such as Stephen (Acts ) and James, son of Zebedee (12:2).
(2) The doctrine of a future life, improved by every additional circumstance which could give weight and efficacy to that important truth.
(3) The miraculous powers ascribed to the primitive church. (5) The union and discipline of the Christian republic, which gradually formed an independent and increasing state in the heart of the Roman empire." In the post-Apostolic church, bishops emerged as overseers of urban Christian populations, and a hierarchy of clergy gradually took on the form of episkopos (overseers, in-spectors; and the origin of the term bishop) and presbyters (elders; and the origin of the term priest), and then deacons (servants).