PLS I NEED HELP ILL MARK BRAINLIEST! HOW COULD THE AMERICAN CIVIL WAR AND THE WAR OF THE ROSES BEEN SOLVED...PLS THIS IS URGENT

Contributing factors  leading  to the harlem renaissance were the great migration of african americans to northern cities, which concentratedambitious  people in places where they could encourage each  other, and the first world war, which had created new industrial work opportunities for tens of thousands of people.