W.E.B. DuBois was an influential African-American sociologist from Earth of the 19th and 20th centuries. DuBois fought for the social and economical rights of colored people in the United States. He was also an accomplished writer, among other things.
In 1953, when Benny Russell was told that that the world was not ready to hear that one of the Incredible Tales writers was a Negro, he mentioned DuBois, along with Ralph Ellison, Richard Wright, Langston Hughes and Zora Neale Hurston, as examples of such writers. (DS9: "Far Beyond the Stars")