Answer:
He challenged stereotypes by showing that blacks are intelligent, cultured, and revolutionary people.
Step-by-step explanation:
W.E.B. Du Bois was one of the greatest American sociologists and activists from the turn of the twentieth century until his death in the 1960s. Invisible by widespread racism in social science, Dubois challenged stereotypes in his exposition of black Americans by displaying photographs, books, and scientific discoveries made by blacks, with this he showed that blacks, contrary to what many thought, were educated, intelligent, innovative, creative and revolutionary people.