This chapter looks at the relationship between social movements, cycles of protest, waves of strikes and transnational advocacy networks of resistance to non-democratic regimes in the third wave of democratization. The chapter presents: a) views of social movements within the democratization literature; b) views of democratization within the social movement literature; c) illustrations on the diverse roles played by movements, depending on the type of democratization process, as well as the stage in which mobilizations emerge (resistance, liberalization, transition, consolidation, expansion).