Answer:
Us history is very long look in a book
Explanation:
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.
I would say Isaac Newton because his branch was basically physics. He was concerned with matter and motion. Also measuring mass of the sun and planets.
Henry Clay was the author of the American system for economic development.
Answer: Getting away from discrimination in America