Last weekend, an 18-year-old white man walked into a predominantly Black neighborhood and shot 13 people, killing 10. Most of the victims were Black. 

Investigators say the shooter’s racist manifesto revealed he was inspired by what’s known as the “white replacement theory.” 

In this episode, we speak to Adolphus Belk Jr., a political science and African-American studies professor at Winthrop University, who explains how deeply woven this belief is within some Americans.