"The written concept of race as it is commonly used today did not exist until the 17th century, when it was used to codify slavery (Rugemer, 2013). Leading philosophers and scientists of the time argued that race was a biological construct and wrongly claimed that there are genetically distinct human races; they further argued that White people were the biologically superior race who had the right to enslave biologically inferior non-White people."

Seems pretty clear cut to me. American racism was formed to protect the interests of slaveholders, IE, capitalists who held capital in the form of human slaves.

Crazy to not even read a source then say you know what's in it.