What is the main idea Dubois examines?

"The Souls of Black Folk" was highly praised, particularly because of Du Bois' steadfast defense of blacks in the United States. In this collection of essays, Du Bois exemplified his negation and disapproval of Booker T. Washington's contention that all blacks must remain subservient members of society. Instead, Du Bois took the publishing of his literature as an opportunity to praise Washington on his contributions, and to urge Washington to speak out against racial injustice.