*† Social movement scholars have long recognized that participants in one campaign often develop a commitment to activism that inspires continued participation for years, even a lifetime. Scholars have identified a number of factors that inspire the development of commitment, including consciousness raising, empowerment, social ties and the development of a shared collective identity. In this article, we highlight another factor that the movement literature has thus far neglected: skills acquisition. Using data from interviews with participants in the AFL-CIO’s Union Summer student internship program, we elaborate on the processes through which participation generates a feeling of empowerment, specifically showing that participants in an intensive movement campaign can learn concrete organizing skills which empower and inspire them to sustain their involvement in activism. In addition, we find that social ties are important not only because of the information and support they provide, but also because they transmit human capital. We demonstrate that those who come to an activist campaign with less experience, and those who participate in a better-organized campaign are more likely to gain activist human capital through their participation. The persistence of activism over an individual’s life course has long captured the interest of social movement scholars. Research convincingly demonstrates the biographical consequences of activism, showing how participation in an intensive movement campaign increases the likelihood of continued political involvement (Corrigall-Brown 2012; Katzenstein 1998; Klatch 1999; McAdam 1988; Taylor et al. 2009; Van Dyke, McAdam and Wilhelm 2000; Whalen and Flacks 1989; Whittier 1995). Indeed, contrary to popular notions of activists “selling out” and abandoning their idealism, experiences like these often inspire participants to continue their activism throughout their lives, as career activists who hold positions in explicitly social change oriented organizations, through more traditional occupations such as social work or education—which nonetheless allow them to pursue social influence consistent with their activist values—or by volunteering their free time to support social movement events. Research on the biographical consequences of activism identifies consciousness raising, empowerment, collective identity, and ties to other activists as factors that facilitate a deep commitment to activism (Fantasia 1988; Gamson 1991; Hirsch 1990; McAdam 1988; Taylor 1996). While the literature is convincing regarding the importance of these factors, it suffers from an important limitation: the failure to more fully explore the dynamics that influence the development of feelings of empowerment, and the role that social ties play in fostering commitment. Although McAdam (1988) describes how the 1964 Freedom Summer voter registration participants applied the tactical and organizational lessons they had learned on the