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What holds a policy network together? Our previous work on policy networks and “network systems” (Rethemeyer ; 2007a,b; Rethemeyer and Hatmaker ) suggests that personal social capital, organizational social capital, and resource dependence are complementary bases for cohesion in policy networks. In this article we take up the challenge issued by Ibarra, Kilduff, and Tsai (, 359) to “bring the individual back in” to network studies by examining the dynamics between individual and organizational social capital (a process that has not been fully developed in the literature) and to tighten the connection between social capital and resource dependence. Although researchers acknowledge that personal social capital contributes to organizational social capital (Knoke ; Burt ), to our knowledge, no studies have examined how it contributes in a longitudinal, interorganizational policy network study.In this paper we …