No one is saying that slavery was invented by White people or that every White person in America is racist. But as the author points out, we are living in a society where the foundation relied on slavery, which became race-based, and breeded racism. And the effects of that system of slavery followed by over 100 years of apartheid led to a society where White people in general benefitted at the expense of minorities and many simple don't want to admit that they still do.