Which african-american sociologist campaigned for civil rights and fought against racism?

William Edward Burghardt Du Bois (W.E.B. Du Bois)

Explanation:

W.E.B. Du Bois was the African-American to earn a Ph.D. from Harvard University, and he applied his expertise in the writing of "The Philadelphia Negro: A Social Study" (1899) and "The Souls of Black Folk" (1903).

Du Bois was the best known spokesperson for African-American rights during the first half of the 20th century. He co-founded the National Association for the Advancement of Colored People (NAACP) in 1909.

the answer is suffrage

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