William Julius Wilson's books," The Declining Significance of Race" (1978) and "The Truly Disadvantaged" (1987), are popular accounts of the black urban underclass. Wilson defines the underclass as "a massive population at the very bottom of the social ladder plagued by poor education and low-paying jobs." He generally limits his discussion to those trapped in the post-civil-rights ghetto in the American rust belt (see "Potential Causes and Proposed Solutions" section of this entry for a more detailed summary of Wilson on the underclass).