“Madness is rare in individuals — but in groups, parties, nations, and ages it is the rule.”

Why? Individuals constantly check their perceptions, ideals, norms, opinions, beliefs and plans both with their fellows individuals and with the concrete data of life. This prevents their ideas from becoming fully self-referential, self-reinforcing and self-fulfilling and alienated from life outside the mind.

But with groups, these very checks against individual madness generate collective madness. Group-think and group-feel permeate the beliefs and attitudes of all its individual members. When the individual tries to reconcile their own individual perceptions, conceptions, intuitions and pangs of conscience with those of their peers, they find that they are alone and out of step. Since few people put much work into testing their own beliefs or trying to get their beliefs to integrate in any coherent way, so most people just assume their trusted sources are trustworthy and that their integration with the people around them will produce personal integrity. Instead of challenging the norms around them, they assimilate. They just go with what their peers think, feel, say and do, and assume all critique of these things from groups or individuals are invalid for some known or unknown reason. And when most of what we know about the world comes from content generated by our own group, it is easy to inhabit a largely imagined world instead of a partially imagined one that must answer to controversy and the chaos of reality.

All it takes is readiness to believe in the exceptional virtuousness of one’s own group and the exceptional viciousness of those who oppose you, and a dash of ordinary human incuriosity, and collective madness is inevitable within two generations.

This is one of those times where anyone who is not actively working to keep their minds in contact with mind-transcendent reality is almost certainly floating off in one or another bubble of collective solipsism.