In the second edition of his essential book―which incorporates vital new information and new material on immigration, race, gender, and the social crisis following 2008―Michael Zweig warns that by allowing the working class to disappear into categories of "middle class" or "consumers," we also allow those with the dominant power, capitalists, to vanish among the rich. Economic relations then appear as comparisons of income or lifestyle rather than as what they truly are―contests of power, at work and in the larger society.