Social movement participation is widespread in most societies. To illustrate, the World Values Survey (2014) shows that 34% of Americans, 38% of Brazilians, 25% of Germans, and 32% of South Africans had attended at least one protest event in the previous year. While this is a large proportion of these countries' populations, what happens to these individuals after they have been initially mobilized? While some remain active and involved over time, not all activism is sustained. In this entry, we propose that there are multiple trajectories that participation can follow once an individual engages with a social movement: persistent participation, transfer, individual abeyance, or disengagement. This entry outlines these trajectories and explores the factors which lead to disengagement from movements over time.