CGP Grey's "This Video Will Make You Angry"[1] makes this point well. Opposing ideas will generate a lot of discussion/activity but mostly within the opposed gr

CGP Grey's "This Video Will Make You Angry"[1] makes this point well. Opposing ideas will generate a lot of discussion/activity but mostly within the opposed groups instead of between them. That further drives polarization as the opposed groups mostly believe their own caricatures of the other group (which further disincentives cross-group discussion). [1] https://youtu.be/rE3j_RHkqJc https://youtu.be/rE3j_RHkqJc