Why did the two major regional versions of christianity part?

The schism(split use schism to be smarter) happened because of religious and political causes. The political cause was the splitting of the Roman empire, in the 400s AD. The western side became the Western empire (capital of Rome) and easter empire (capital at Constantinople)

The transcontinental railroad provided a means of fast transportation. it cut a 6 month trip into 6 days, created jobs for many people and encouraged immigration. the homestead act played a huge role in western expansion; it allowed settlers to begin a fresh start, and gave them land in exchange for their residence for up to five years and a small fee.