There has been a recent explosion of interest in the external influences on the political and economic transformations of postcommunist states. This article consolidates several analytical advances in this literature and distills three main functions of external actors, namely, to lengthen the time horizons ofpostcommunist politicians, to expand the circle of interested reformers, and t o deter opponents of reform. The article argues that a focus on external influences is a growth area for good conceptual work only if it addresses the union of foreign and domestic influences, rather than treating them as stylized alternative explanations. The central point is that outside actors should be considered as striving to influence the choices of existing domestic actors with whom they can be seen to form a kind of informal coalition. At bottom, outsiders do best through a combination of strategies: strengthening domestic actors already committed to their approach, winning over new domestic actors to their priorities, and preventing the unconvinced from obstructing reforms.