@Olivier5,
Thanks nono/whitey for choosing that answer.
A little annecdote on the same topic:
As not so many people know, Alexandre Dumas père -- the author of the three musketeers, the man in the iron mask, and countless other historic novels -- was a "quarteron": his grand father was a black slave and his father was a metis (he was a soldier, made general by Napoleon Bonaparte). So Dumas had "1/4 of black blood", as people used to say in those days.
He was also a very rich man, and a socialite. One evening as he was playing cards in one of these Parisian salons where the French cultural and political elite used to mix, another guest started a little speach about evolution. Darwinism was new and debate about it raging... That particular debater was arguing that black people were closer to apes than white people, a sort of intermediary level between apes and (white) men. He was trying to offend Dumas, who feigned to not pay attention and kept playing cards...
At some point, the racist guest addressed Dumas directly: "but Monsieur Dumas can confirm all this, since his grandfather was a negro!" Dumas retorted: "Indeed, my father was a mulato, my grandfather was a negro, and my great-grandfather was a monkey. As you can see sir, my family starts where yours ends..."
Which, according to Izzy, can only mean that Dumas was racist, since he compared a black man to a monkey... Some people can't understand satire.