“…We use that protest survey data base to explore the structural bases of organized collective mobilization among climate justice protesters. In line with existing research on other movements – for example, the global justice, anti-austerity, and secessionist mobilizations (see, e.g., Chase-Dunn and Reese, 2007); della Porta, 2015; Giugni and Grasso, 2019; della Porta and Portos, 2020, 2021) – in the case of contemporary climate activism, we identify heterogeneity in terms of social composition and the potential to forge cross-class coalitions in order to build a mass movement. While young, educated, middle-class people are overrepresented in, and are often leading, the climate school strikes and mobilizations, these protest events involves people from a variety of social groups, including the urban working classes.…”