Legitimacy is vital to unions. Without it, they lose political and ideological support, members, and access to funds. Gary Chaison and Barbara Bigelow use the concept of legitimacy as a lens through which to understand the steady decline in union size and influence and to suggest new strategies for union revitalization.Chaison and Bigelow relate legitimacy to five case studies: the UPS strike, the organization of clerical workers at Harvard, the AFL-CIO associate membership campaign, the fight against NAFTA, and the Massachusetts Nurses Association Campaign for Safe Care. The cases show the...