Social media has lowered the “IQ” of public discourse — not by reducing actual intelligence, but by rewarding speed, outrage, and oversimplification over critical thinking. Research consistently links heavy social media use to reduced attention span, cognitive overload, weaker reasoning, and higher exposure to misinformation. The result is louder conversations, shallower arguments, and less nuance in public debate.
The graph above illustrates a well-documented trend found across multiple studies: as average daily social media use increases, the quality of public discourse declines (measured via attention, reasoning, and information accuracy indicators).