In looking at QEEG results, there is something called Coherence. You would think coherence would be a good thing, but it actually is not, at least as I understand it.
Your brain is intended to process many things at once, all in a distributed way. Your left frontal lobe can be doing one thing, and your right frontal lobe something slightly different.
Coherence means they are phase locked with one another, which means the local processing function has diminished, and a sort of cognitive spasm is happening. Behaviorally, as I understand it–and I am a very new student, so it is certainly possible I am misstating this–it would be reflected as cognitive rigidity, mostly likely combined with following behavioral rigidity.
Social systems are similar. We all work best when we work independently most of the time, but when we sometimes come together in groups to accomplish something specific. In the brain, periods of coherence when working on a task are healthy. It is long term, unvarying coherence, particularly when your eyes are closed, and there is no task in front of you, where there is a problem.
Mass conformity is a type of coerced coherence. It is like a mask put over people, over their brains, which has an inhibitory effect, such that their innate individual creativity and spontaneity are muted. You get people acting, talking, moving in similar ways, which is inherently unnatural. It is inherently unhealthy.