Abstract: This study explores the generational evolution of social media activism, emphasizing how digital technologies have reshaped the dynamics of collective action from the Baby Boomers to Generation Z. Drawing on secondary data and grounded in Manuel Castells’ Network Society Theory, the research examines how different generations utilize communication technologies to mobilize, express dissent, and construct digital publics. Special attention is given to recent youth-led movements such as the Nepal Gen Z Movement (September 2025), characterized by protests against social media restrictions, corruption, and nepotism, and amplified through hashtag activism like #NepoKids. The study reveals a clear transition from structured, ideology-driven activism to decentralized, visual, and instantaneous forms of mobilization facilitated by digital networks. While social media democratizes participation and amplifies marginalized voices, it also introduces challenges such as algorithmic bias, digital surveillance, and superficial engagement. Ultimately, the research underscores that generational activism through social media represents both a technological and sociopolitical evolution in how power, identity, and resistance are negotiated in the digital age.

Keywords: Social media activism, Generation Z, digital mobilization, network society, Nepal Gen Z Movement.