Railroads led to the adoption of

judaism, christianity and islam, are all abrahamic religions and therefore have in common the hebrew idea of a single god which is the source of all morality. the idea of the covenant is only related to judaism, while dharma is a concept of indian religions and the four noble truths are basic principles of buddhism.

google it and it will pop up

the western roman empire flourished, but the eastern portion of the empire struggled.