Jes' sayin' what's on everyone's collective mind is all.
Funny how Homo Sapiens often fragments his consciousness into many different layers. He has things he knows but won't admit to, things he admits to he doesn't believe, things he claims to believe when he knows the contrary is actually true. Nothing is true for him until it's a consensus, nothing is ever false no matter how ridiculous it is exposed as being until there is a consensus it is so. Reality and Homo Sapiens are usually not on speaking terms.
There is no way Neanderthals would have survived over 400,000+ years in Europe unchallenged had they been this unabashedly crazy. You just can't get much done with a brain that works no better than that. You take two steps forwards, your subconscious steps back three paces. It's an organ at war with itself where the real total output ends up being zero. Without neanderthals and their hybrid legacy, I think Sapiens would live in caves and eat their meat raw.
The second half of a civilization is the decline phase in Europeans because it's the era when all the Sapiens occupy the institutions and kick the Neos out. Everything become insincere, theatrical and an exercise in duplicity.
I reckon that Yoshi thrives most in the latter half of the cycle because he's an opportunist and like a termite, requires the wood to be rotten to get his teeth into to begin with. I'm not longer so certain they are the initiators. They are more like the finishers who polish it off. Without widespread decadence and complete loss of equilibrium, I don't know that beany babies would ever be able to rule the roost with such utter aplomb. The first requirement is that the host population must totally lose touch with reality in order to be susceptible to the new modified one that is then offered by their scribes, who themselves live in a world utterly built on sophistry and circular logic. Who would buy into these tortured dreams to begin with when they had anything like a well adjusted perspective? There must be sickness first, then comes the feeble state of malady.