No it won't make it "unhappen," but it won't change anything to dredge it up every election cycle, and try to blame those who were born 150 years after the fact either. Do liberals even realize that the first slave holder in America was a black man, named Anthony Johnson? He was an indentured servant (paid) who was released from his obligation after 7 years, and bought himself a slave. Do liberals realize that black chieftans in Africa rounded up their own people, and sold them into slavery? Do liberals know anything?