I've familiarized myself with church history, and I would characterize it as a devolution rather than an evolution, and upholding the Jewish Sect of the first century Disciples/Apostles rather than the plethora of men's established denominational sects. Here is my starting basis to explain what happened: "He {Paul} writes the same way in all his letters, speaking in them of these matters. His letters contain some things that are hard to understand, which ignorant and unstable people distort, as they do the other Scriptures, to their own destruction." - 2Peter 3:16, New International Version.