My research focuses on the theory of collective action and its applications in social movements and environmental conflicts. Drawing upon an empirical review of cases of collective action and using the theoretical frameworks of game theory and social network analysis, I work on developing a model of collective action as a dynamic process and consider the case in which an individual’s decision to act collectively with fellow group members is influenced by both acquisitive and constitutive motives as well as by their endogenously determined beliefs. Social network analysis is useful in identifying the process of belief formation and the dynamics of the collective action process. Considering different distributions of individuals of different types, I aim to analyze not only quantitative but also qualitative impacts of heterogeneity on collective action. I am also interested in using computer simulation to have a better understanding of these dynamic processes.