The famous writer who was also a prominent social activist and founded the NAACP is W.E.B. Du Bois. An influential intellectual, Du Bois advocated for civil rights and racial equality in America during the early 20th century. His seminal work, "The Souls of Black Folk," explored the complexities of African-American identity and the ongoing struggle against racism. As a co-founder of the NAACP, he played a crucial role in advancing civil rights activism and promoting education among African Americans. Du Bois's legacy endures as a testament to the fight for social justice and equality.