How did the Roman Empire help Christianity become a universal religion?
The Roman Empire was the longest lasting empire of the Antiquity and had one of the largest extend ever achieved until a modern era that one point had 1/4 of world population under its control. As a country that was unified and controlled by Rome, it also propagated universal culture, economy, policy, government, law, and social order that stretched from Northern Sea to Mesopotamia. Anyone who was within the territory of the Roman Empire had been a subject of the Rome that was implementing its will. Hence, this vast empire helped to move goods and legions from one corner of the empire to the other, but also allowed an extensive exchange of the people, ideas, cultural and social inputs without any physical political boundary over 3000 miles. The Roman Empire was also truly cosmopolitan that tolerated much of the local customs. In this environment, the christian faith had an excellent opportunity to spread. Rome had tolerated local faith and over the expansion had accepted many deities f
