The late Dr Albert Scweizer, who spent almost his entire life in Africa, working to uplift the Black man, received the Nobel Prize for Peace in 1952. He also held several doctorate degrees. 

This is what he said shortly before his death:

I have given my life to alleviate the sufferings of Africa. There is something that all white men who have lived here, must learn and know; that these individuals are a sub-race; they have neither the intellectual , mental or emotional abilities to equate or share in any of the functions of our civilisation. 

I have given my life to try to bring unto them the advantages which our civilisation must offer, but I have become well aware that we must retain this status; white, the superior, and they the inferior; for whenever a white man seeks to live among them as their equal, they will either destroy him or devour him, and they will destroy all his work; and so for any existing relationship or for any benefit to this people let white men from anywhere in the world who would come to help Africa remember that you must continually retain this status; you the master, and they the inferior, like children that you would help or teach. Never fraternise with them as equals, never accept them as your social equals ; or they will devour you; they will destroy you.