Answer: They showed the country that integration could be successful.
Step-by-step explanation:
Branch Rickey (1881-1965), a white man, was the general manager of the Brooklyn Dodgers. He signed a minor- league contract with Jackie Robinson, a Negro League All-Star, who became the first African-American player in the history of baseball (1947). This had a fundamental role in the integration of major league baseball as well as in the civil rights movement.