Not only have they promoted this by any means possible over the centuries, but even more disgracefully, they have even successfully co-opted religion to promote this evil doctrine.
For, from Christianity was established and recognized by the imperial world power in Rome, as the 'true religion' their depiction of Jesus as white with blue eyes, strengthened the campaign.
Latterly too, the Dutch Reform Church in South Africa was for decades, masters of this ‘spiritual’ doctrine, as has the white evangelical movement in the USA, though they have been a little more subtle.
Unfortunately, this evil doctrine has not only been super successful among millions of whites but also, they have even accomplished the mammoth feat of convincing a large segment of the black population that this is true.
Some of the best known and recent examples of this abuse in the USA have been;
From 1932 to 1972 the public health service along with the Tuskegee institute established a program called “Tuskegee Study of Untreated Syphilis in the Negro Male.” Under this program, 200 black men in Tusgagee diagnosed with syphilis, were never told of their illness and were denied treatment. They were then used as human guinea pigs to allow the scientist to follow their progression and symptoms of the disease. They all subsequently died from syphilis and their families were never told that they could have been treated.
The study continued for four decades. (NBC News.)
In the 1950s Henrietta Lacks, an African-American woman was the unwitting source of cells which were cultured by George Otto Gey to create the first known human immortal cell line to be cloned for medical research. This was done without the lady's knowledge or consent, from a tumor biopsied during treatment for cervical cancer at Johns Hopkins Hospital in Baltimore, Maryland, U.S.
Allegations are that doctors have grown roughly 20 tons of her cells since her death.
Camille Locht, head of research at the National Institute of Health and Medical Research (INSERM) in Lille, was also in on the discussion and was said to have agreed with the suggestion declaring; "You are right. We are in the process of thinking about a study in parallel in Africa!"
While that official agency most likely will not sanction the move, what is to prevent private investors from doing it in their haste to enrich pharmaceutical companies?
I will tell you what; only constant vigil by persons of color throughout the entire planet can guarantee that this will not be done. For as Edmund Burke, "All that is necessary for evil to succeed is that good man (people) do nothing.
So it is to our own peril if, in 2020, we the black people of the world sit idly by and allow the continuation of the evil practice by wicked scientists and other exploiters, who treat our brothers and sisters, wherever they are, as lab rats!