Jackie Robinson was a barrier breaker in American society-- someone who broke down barriers to full participation, influenced how millions of people thought about race, opened up Organized Baseball in a way it had never been opened up before. After Robinson, other African-American ballplayers many of whom found Robinson an inspiration and role model, had an easier time gaining acceptance. And not only baseball players, but non-European athletes in other sports, including basketball and football. And not only African-Americans, but Latinos, too. And perhaps eventually not just men--but women, too.