It doesn't matter who came first. For example, MLK wasn't the first person to pose rights for black people, but he was the most significant contributer. Likewise, Columbus wasn't the first person to discover America, but he was the first person to colonize it and make it known unto the world (and also since the original claim was that he was dumb, I will address that too. Columbus's thinking was ahead of his time, he deducted that since the earth was round, that there may be a more efficient route to India, and although that was wrong, it still portrays his intelligence and imagination.)