“The present prosperity of the UK and America is built upon the enslavement of West Africans.“
That’s not true. Plantations ceased to be profitable long before slavery was ended, prosperity of developed nations has its roots in the industrial revolution from the 1850s onwards. Steam power, railroads shipbuilding, Britain supplying the colonies with technology to improve infrastructure which in turn fed and supplied the UK with raw materials.
Some would call that exploitation, maybe so but it was not slavery, rivalry between nations caused 2 World wars in which countless millions died, colonial rule ended quickly in the 1960s. Have former colonies thrived?, in most cases no because investment was taken away, our prosperity lies in the exploitation of developing nations now, not 200 yrs ago.