The assembly line and the use of machines due to Henry Ford making the model T
Immune to European diseases, had no knowledge of the New World, tribal nations would have an uprising, and the African slave market was more convenient and cost efficient.
A large population of wealthy people
Benjamin Franklin thought that it was hard for people to compromise because most men, having come from different religions, thought that they possessed of all truth, and that others beliefs would be different from their own. He believed that people found it hard to compromise because it was difficult for them to accept different types of perspectives.