Here comes Labor Day! Where are the unions? At a time when millions of Americans are unsatisfied with their jobs, when about 50 million laborers work in occupations with a median wage of less than $15 per hour (according to Brookings researchers), union membership remains low compared to its historic high reached in the quarter-century after the Second World War. In fact, the labor movement's achievements -- the reason to celebrate on this three-day weekend -- have receded as mega-companies run by billionaires, operating in a global economy, possess enough power to block their workforces from unionizing. Historian Nelson Lichtenstein discusses the economic, political, and cultural forces working against unions in the 21st century.