Martin Luther King's famous speech "I Have a Dream" deals with racism and segregation of people of color. He says in his speech that he wishes for a world where those things don't exist, and where every human is free and shares equal rights as everyone else, regardless of religion, gender, skin color, or sexual preferences. Hope this helps!
Lincoln was technically racist in the sense that he viewed blacks to be inherently different than whites, but given the time in which he lived he was probably the least racist person in the United States. He was above all a pragmatist.
I believe that the 15th Amendment granted suffrage (the right to vote) to African American men.
