James Damore writes at the Wall Street Journal:
Echo chambers maintain themselves by creating a shared spirit and keeping discussion confined within certain limits. As Noam Chomsky once observed, “The smart way to keep people passive and obedient is to strictly limit the spectrum of acceptable opinion, but allow very lively debate within that spectrum.”
But echo chambers also have to guard against dissent and opposition. Whether it’s in our homes, online or in our workplaces, a consensus is maintained by shaming people into conformity or excommunicating them if they persist in violating taboos. Public shaming serves not only to display the virtue of those doing the shaming but also warns others that the same punishment awaits them if they don’t conform.