There is no reason to wonder why Major League Baseball celebrates "Jackie Robinson Day" every April 15.
Robinson's place in baseball history is well-known and rightfully revered. He stood up against the institutionalized hatred of the Jim Crow era to open the major leagues to African-Americans and soften the heart of a nation steeped in racism.
The only thing to wonder about on the 70th anniversary of Robinson's debut with the Brooklyn Dodgers is why it took MLB more than a half-century to fully recognize his sacrifice and achievement.
Or why we owe former Dodgers general manager Al Campanis an ironic debt of gratitude for forcing the game to take a hard look in the mirror at its inability to fully assimilate African-Americans and other minorities at every level of the industry.