1.Du Bois's famous formulation was 'the problem of the twentieth century is the problem of:
2.W. E. B. Du Bois's *The Philadelphia Negro* (1899) is significant because it:
3.Du Bois's concept of 'double consciousness' describes:
4.*Black Reconstruction in America* (1935) argued that:
5.Aldon Morris's *The Scholar Denied* (2015) argues that: