DNA certainly proves the case but especially older black nationalists in the U.S. (and maybe in Great Britain as well) try claiming math, engineering, architecture, art, etc. were invented by black Africans, claiming they were the ancient Egyptians, which they were not but that never dissuaded Malcom X for claiming it, as does Farrakhan today.
Unfortunately, that is a lie that has been told so often and probably is a lie that has made it into the U.S. textbooks so that all our kids now are as certain of it as they are of the 1970 lie of globull warming!
But, they wuz kangz!
American blacks mostly came from West Africa... pretty far walk from Egypt.
In the mid-late 60s, in California, I had to take a Lower Division history class; the instructor was black. No big deal.
Then he started in on the Egyptians and Greeks, including Cleopatra, were black; that West Africans had a thriving pre-Columbian transatlantic trade going on with the Mayans and/or Aztecs; and that a black invented the radio long before Marconi, and then I filed a drop.
The 70s lie was a new ice age, brought on by human activity. Warming lies started when the predicted ice age fizzled. When the warming lie fizzled too, it became climate change.