Why echo chambers form online
Launch library · evergreen read

An echo chamber describes an online environment where a person mostly encounters views similar to their own, reinforced repeatedly until alternative perspectives feel unfamiliar or even faintly suspicious. These environments tend to form gradually, through a combination of personal choice and platform design, rather than through any single deliberate decision made by the person involved.
Once inside an echo chamber, a person's sense of what is normal or widely believed can shift considerably, even while their actual social world remains relatively small and unchanged. This can make outside perspectives feel more extreme by comparison, even when those perspectives simply reflect fairly mainstream and widely held views.
Recognising the pattern is the first step toward genuinely countering it. Deliberately seeking varied sources, staying connected to people with different views, and maintaining strong offline relationships all help keep an online echo chamber from becoming a person's entire frame of reference for understanding the world.