What led to the beginnings of the civil rights movement during the Progressive Era?

The American civil rights movement started in the mid-1950s. A major catalyst in the push for civil rights was in December 1955, when NAACP activist Rosa Parks refused to give up her seat on a public bus to a white man. Read about Rosa Parks and the mass bus boycott she sparked

Explanation:

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.

the correct answer is: the fact that the anti-federalist papers were considered poorly written.