Answer:
In simple words, Robinson's remarkable physical prowess and poise under duress successfully led to National League Baseball's inclusion, as well as his 10-year tenure with both the Dodgers — including his vocal activism in his latter years — helped pave the way for the developing civil rights campaign.
I Jackie Robinson shattered the colour barrier, changing not only sport but also American society as well as civilization Jackie Robinson entered the baseball field at a period when bigotry and racial discrimination were rampant in Americans, and no one seemed to mind.