Well at its root, Christianity means a body that follows Christ. Therefore, there cannot be divisions within a body. Sin causes people to separate, but there is no division in Christ.
The main factors contributing to divisions within Christianity include theological differences, interpretations of scripture, historical events, cultural influences, and disagreements over church authority and practices.
Catholic, Orthodox, and Protestant are the three main divisions of Christianity.
Roman Catholicism. .................................... Christianity is the religion. Roman Catholicism is one church or major division within Christianity. The Protestant Church and Orthodox Church are other major divisions.
Any divisions of Christianity were created by men and usually the result of self serving church systems. There should be no divisions in Christianity (since Christ be the head of the church). If we were to discuss two major divisions I would have to point toward Established Church Systems and Protestant Reformation the latter upon which the United States is established. (Read William Bradford)
Within the Abrahamic faiths—Judaism, Christianity, and Islam—there are significant internal differences and divisions. In Judaism, distinctions exist between Orthodox, Conservative, and Reform movements, each with varying interpretations of Jewish law and tradition. Christianity is divided into numerous denominations, such as Catholicism, Protestantism, and Orthodoxy, differing in beliefs, practices, and governance. Islam has major sects, primarily Sunni and Shia, which have different theological perspectives and historical contexts. These internal divisions reflect diverse interpretations of scripture, tradition, and religious practice.
A movement towards more unity, and less divisions.
I tend to think of Catholicism as a branch of Christianity. In that case, Christianity is the most widely practiced religion worldwide. Catholicism is the largest group / church / denomination / division within Christianity, and I believe it is the largest such group worldwide as well, considering divisions of all other religions.
The main divisions are catholic, protestant , charismatic, and evangelical churches.
Catholic, Methodist, United Church of Christ, Baptist, and Lutheran
A subshell is a subdivision of electron shells.
Within Christianity all people are just considered children of God, thus there are no "social classes" within Christianity.
Subshell or Subshells