  In chapter 1 of Dusk of Dawn, Du Bois describes his thought regarding the causes of the oppression of the darker races as evolving through three stages—roughly, from thinking that racial oppression was caused by ignorance; to thinking that it was caused by ignorance and ill-will; to thinking that it was caused by ignorance and ill-will and a conjunction of economic motives and unconscious, irrational acts and reactions.  Corresponding to each stage, Du Bois tells us, was an increasingly complex account of the political strategies the darker races require to upend racial oppression. Where ignorance is the problem, science and education is needed to fight racial injustice; where ill-will is the issue, the black world must fight for its freedom, relying on truth, boycott, propaganda and mob frenzy as instruments of sudden and immediate assault. Where, finally, economic interest and/or unconscious, irrational motive sustain racial oppression, “not sudden assault but long siege was indicated; careful planning and subtle campaign with the education of growing generations and propaganda” (1940, 2–3).