Answer:
The leader that expressed a political division in the African American community in the book The Souls of Black Folk was W.E.B. Du Bois.
Explanation:
The Souls of Black Folk is a collection of essays published in 1903 by the African American writer and activist W.E.B. Du Bois. In it, Du Bois considers the position of black people in the United States, where institutional racism was dominant, developing the concept of "double consciousness", that is, the thesis that African Americans feel the conflict between belonging to the black race and the American nation, so there is a mixed feeling of being part of the American society and being outsiders of it at the same time, and the conflicts and divisions that this situation creates. The book is now considered one of the classic works of American literature.