The prominent social reformer advocating for the rights of minorities was W.E.B. Du Bois. Co-founder of the NAACP, Du Bois was a pivotal figure in the struggle for civil rights and racial equality in the early 20th century. His advocacy for education, social justice, and political representation for African Americans challenged systemic racism in the United States. Du Bois's writings and activism have left a lasting legacy on civil rights movements and continue to inspire social justice efforts today.