We are hearing calls both from right and left for an amicable national divorce. In truth, the states were never "hitched" in the first place, at least not by any plausible definition of marriage.
Perhaps the most pernicious Keynesian myth is that a market economy needs wars in order to keep full employment. Wars don't stimulate the economy; they depress it.
When the Boeing 737 MAX had two crashes, the usual suspects called for more regulation. It turns out that the crashes were due more to regulatory failure than anything else.