Coalitions can be critical to social movement success. This article compares thirty-five Indivisible groups founded after the 2017 Women’s March in ten U.S. cities. Through analysis of Facebook pages and interviews with activists, I find that groups that work more often in coalition mobilize more events and are more likely to survive. In cities with long histories of activism, groups tend to engage in more coalitions and a particular type of deep coalition work I call “supercoalitions” that strategically coordinate across a city and work to accumulate and channel resources to pre-existing organizations. In cities without long histories of activism, groups are less likely to engage in coalitions. However, when they do, they tend to organize into broad civil society coalitions that bring together a diversity of political and nonpolitical actors which can be very successful over time. This analysis highlights how coalitions are shaped by local political context.

联盟对于社会运动的成功至关重要。本文比较了 2017 年妇女大游行后在美国十个城市成立的 35 个 Indivisible 团体。通过对 Facebook 页面的分析和对活动家的采访，我发现在联盟中工作更频繁的团体能够动员更多的事件并且更有可能生存下来。在激进主义历史悠久的城市中，团体倾向于参与更多的联盟和一种我称之为“超级联盟”的特定类型的深度联盟工作，它们在整个城市中进行战略协调，并努力积累资源并将资源输送给现有的组织。在没有长期激进主义历史的城市，团体不太可能参与联盟。然而，当他们这样做时，他们倾向于组织广泛的民间社会联盟，将各种政治和非政治行为者聚集在一起，随着时间的推移，这些行为者可能会非常成功。该分析强调了当地政治环境如何塑造联盟。