Answer:
William Cooper Nell was an African-American abolitionist, journalist, publisher, author, and civil servant of Boston, Massachusetts, who worked for integration of schools and public facilities in the state. Which led to other states following suit! He is very an infuental person in American history and helped further African American quality of life.
Without William it is hard to say where the American schooling system would stand on intigrated vs non intigrated schooling. It is very possible we would still have fully intigrated school systems, but it would have come at a much later date.