Robert Anson Heinlein (; July 7, 1907 – May 8, 1988) was an American science-fiction writer. Often called the "dean of science fiction writers", he wrote sometimes controversial works which continue to have an influential effect on the science-fiction genre, and on modern culture more generally.
You may find more from Robert A. Heinlein on Wikiquote
I am quite sure . . . I have no race prejudices, and I think I have no color prejudices, nor caste prejudices, nor creed prejudices. Indeed, I know it. I can stand any society. All I care to know is that a man is a human being — that is enough for me; he can't be any worse.