The article provides an overview of the research and theory on emotions in protest and social movements over the past 20 years. It highlights the shift from general theoretical statements about emotions' importance in political action to the identification of specific emotions as causal mechanisms. The author proposes a typology of emotional processes to show that not all emotions function in the same way and to encourage research into how different emotions interact. This approach aims to overcome the suspicion that emotions are irrational and to avoid the overreaction that suggests emotions always help (and never hinder) protest mobilization and goals. The article discusses the various types of emotions, such as reflexive emotions, states of mind, affective loyalties, and moral emotions, and their roles in different aspects of protest and social movements. It explores how emotions can be both means and ends, influencing mobilization, strategies, and success. The author also examines the impact of emotions on reputation, belonging, sensual satisfaction, impact, and the use of rituals and rhetoric to shape attention and behavior. The article concludes by emphasizing the complex interplay between emotions and other factors, such as identity, rituals, and group dynamics, and the importance of recognizing the emotional processes in social movements. It suggests that a deeper understanding of emotions can enhance our ability to analyze and influence these movements.The article provides an overview of the research and theory on emotions in protest and social movements over the past 20 years. It highlights the shift from general theoretical statements about emotions' importance in political action to the identification of specific emotions as causal mechanisms. The author proposes a typology of emotional processes to show that not all emotions function in the same way and to encourage research into how different emotions interact. This approach aims to overcome the suspicion that emotions are irrational and to avoid the overreaction that suggests emotions always help (and never hinder) protest mobilization and goals. The article discusses the various types of emotions, such as reflexive emotions, states of mind, affective loyalties, and moral emotions, and their roles in different aspects of protest and social movements. It explores how emotions can be both means and ends, influencing mobilization, strategies, and success. The author also examines the impact of emotions on reputation, belonging, sensual satisfaction, impact, and the use of rituals and rhetoric to shape attention and behavior. The article concludes by emphasizing the complex interplay between emotions and other factors, such as identity, rituals, and group dynamics, and the importance of recognizing the emotional processes in social movements. It suggests that a deeper understanding of emotions can enhance our ability to analyze and influence these movements.