In one work, this thinker analyzed Helen Boardman’s three dominant theses (15[1])about a certain historical period found in textbooks and described a nation as “ashamed” in the section “The (15[1])Propaganda of History.” That (15[1])book by this thinker analyzes the “promised land” of the white laborer (15[2])and begins with (15[2])the sections “The Black Worker” and “The White Worker.” One work by this thinker (15[1])was praised (15[1])for its criticism (15[1])of the Dunning School in a book (15[1])by Eric (*) Foner; that book was “Black Reconstruction.” Another work (10[1])by this thinker includes (10[1])many (10[1])spirituals in “The Sorrow Songs” and (10[1])begins with the essay “Of (10[2]-5[1])our spiritual strivings.” That book by this thinker claims the problem of the twentieth century is the (10[2])“color line.” This man (10[1])worked on the Encyclopedia Africana after emigrating to Ghana. For 10 (10[1])points, name this American thinker and activist who wrote “The Souls of Black Folk.” ■END■