I think the first nation supported the rail way because it gave them a new way of transportation which is faster and easier
Laissez-Faire is an economic policy that says governments should not interfere with the free market; let the market develop on its own.
rome, along with almost every civilization in the worlds history cannot create and manufacture all its needed goods so they needed allies to help them do so. also with them trying one of their allies got to close. so close that they took advantage of them and then defeated them thus ruling both their old and new land.