This article examines union members'evaluation of the relevance of unions and their identification with a traditional collective value frame for union action. It seeks to take account of the impact of increasing labor market heterogeneity, declining instrumentality, and the behavior of unions and employers. Using Canadian data gathered from individual union members and their local union leaders, the study finds that new labor market identities are notlinked to weaker belief in the relevance of unions but are associated with weaker identification with the traditional value frame. Although declining instrumentality and hostile employer behavior are associated with greater identification with traditional value frames, greater union democracy is associated with less membership disaffection on both the relevance of unions and their collective modes of action. Union democracy is therefore found to be a key tool to address membership disaffection and to generate collective identities for a renewed union project.