Jung must have been delusional.

when i think of mass stuff, war, illness, money, ignorance, consumerism, drama, disasters all shoved at us with mass communications on top of our own personal weights, job, health, family etc., its kind of a wonder we're not down more marbles than we are.

Too little consideration of the role of religion.

I think all the chemicals, pollution, and radiation emitting devices are poisoning us much as lead did to Romans. This is what begins to happen as a result of desire and wealth (even a low level of it). I'd venture to say that it is the source of most (if not all) cancers and neurological problems. Neurosis we do on top of the pollution.

The problem with this theory it doesn't take into account numbers. There have always been conspiracy theories (maybe they weren't called that but the effect was the same). Even in 1918 there were those that refused to wear masks. Now our population is larger, by far, than ever and it is more diverse (read polarized) than ever. What else should one expect.

Mass hysteria is an interesting phenomenon to which people are prone. Just think back to the Salem witch trials, or even the accusations made toward pre-school teachers in the 1990s, who were accused of Satan-worshiping. I'm not sure what survival value it had when it first developed, but probably did serve to create an us-vs.-them mentality, which protected villages and clans. Now it does not serve us well, but we have not evolved past it.