Among the most prominent of post-slavery writers is W. E. B. Du Bois (1868–1963), who had a doctorate in philosophy from Harvard University, and was one of the original founders of the NAACP in 1910. At the turn of the century, Du Bois published a highly influential collection of essays entitled "The Souls of Black Folk". The essays on race were groundbreaking and drew from Du Bois's personal experiences to describe how African Americans lived in rural Georgia and in the larger American society. Du Bois wrote: "The problem of the twentieth century is the problem of the color-line", a statement since considered prescient. Du Bois believed that African Americans should, because of their common interests, work together to battle prejudice and inequity. He was a professor at Atlanta University and later at Howard University.