Unions represent under 7% of the private sector work force, perhaps 1/3d of public sector employees, down from a peak of union representation in the 1950s. Some argue that unions are necessary, and the decline of unionization is a root cause of the economic decline in the US middle class for several decades. Have unions outlived their usefulness in the US economy, should be shut down as a right of employees to bargain with their employers? Or do unions have an important role in the economy, ensuring that the economic pie is shared among everyone who helps bake that pie? What public policies would you advocate, based on your view of the future role of unions in the US?