Nelson Lichtenstein, who parlayed a career writing about midcentury capitalism and industrial unionism into extraordinarily penetrating accounts of why the economic regime we live under today is so deeply unsatisfying. One abandoned idea documented in his most recent book, “A Contest of Ideas: Capital, Politics, and Labor,” haunts me. Powerful people in the Democratic Party, like Senator Robert Wagner of New York, used to insist that the job of liberalism was to penetrate the “black box” of the corporation and turn the workplace into a more democratic institution. They believed that to leave decision-making in the great firms that dominate our lives merely to owners (as opposed to, say, the system of “co-determination” between labor and management under which the German economy now thrives) was no less than a violation of the Constitution’s 13th Amendment, which outlawed involuntary servitude.