Well, people could communicate easier and be able to get around easier. This helped people in the U.S. lot.
President Theodore Roosevelt's Big Stick policy differs from Dollar Diplomacy and Moral Diplomacy because it emphasized US military strength.
Harlem Renaissance was a movement with many people performing different tasks (some independently from each other) and many people could be called its leader, but one of the people most often mentioned as the leader is <span>W. E. B. Du Bois</span>
Answer:
geology, guess the age of artifacts