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The study of how large populations organize, behave, and transform in an era defined by digital connectivity, algorithmic curation, and global information flows. 21st-century masses are fundamentally different from their predecessors—they're simultaneously more fragmented (everyone in personalized bubbles) and more connected (able to coordinate instantly across continents). The sociology examines how masses form around shared content (viral videos, memes, hashtags) rather than shared location, how they're mobilized by algorithms rather than leaders, and how they exert power through attention rather than physical presence. It also examines the new institutions that manage masses—platforms, data brokers, content moderators—and the new forms of mass action—cancel culture, meme warfare, online movements. Understanding 21st-century masses means understanding that the crowd is now in your pocket, always potentially active, always watching.
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