Baseball has done it

"Jackie Robinson's theme is that integration in baseball has proved that Americans can live together in peaceful competition. The theme is developed with a history of Negroes in baseball. Excerpts from their lives as players are given in their own words, by Larry Doby, for instance, and by Roy Campanella. Ball club managers, prominently Branch Rickey, tell why they hired Negroes and how the barriers were broken down.".