But I remain curious about broader things: metrics pertaining to safety, education, longevity, et cetera.

‘scool if Einstein can shoot hoops an’ all, but yo, he got my tensor algebra, Bro?

That their children were three to five inches taller is a pretty massive indicator.

Matthew 7:6
“Give not that which is holy unto the dogs, neither cast ye your pearls before swine, lest they trample them under their feet, and turn again and rend you.”

— Albert Schweitzer, as quoted in The Observer (1955-10-23).

He later repudiated this statement, saying “The time for speaking of older and younger brothers has passed.”

According to Wikiquote, a more damning statement has been misattributed to him:

“I have given my life to try to alleviate the sufferings of Africa. There is something that all white men who have lived here like I must learn and know: that these individuals are a sub-race. They have neither the intellectual, mental, or emotional abilities to equate or to share equally with white men in any function of our civilization. I have given my life to try to bring them the advantages which our civilization must offer, but I have become well aware that we must retain this status: the superior and they the inferior. For whenever a white man seeks to live among them as their equals they will either destroy him or devour him. And they will destroy all of his work. Let white men from anywhere in the world, who would come to 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 fraternize with them as equals. Never accept them as your social equals or they will devour you. They will destroy you.”