wolfguard - "China sleeps. Let her sleep. When she wakes, the world will tremble." Or you could go with "That was then, this is now." In terms of economics, we should probably be grateful to the Communists. Sure they've gotten themselves an army and nukes and a lot of money, but they are afraid of their people and keep them on a tight leash. Imagine what would happen if that entire country of hard-working entrepreneurs were unleashed? *g*
The theories you listed about Trump tweets might all be true, possibly even all at the same time. But don't forget that they were and are a way for him to reach people when all but one of the media companies were and are engaged in trying to sink him. They are a way for him to make his will known (or prod things along) when a lot of the people in his own branch of the government not only don't like him, but are actively trying to subvert him. It doesn't mean that he doesn't take great pleasure in using them to slip the traces or to drive friend and foe alike crazy. *g*
*blink* " I think your view on the crowds, Trump supporters and detractors, is more spot on that mine.(sic)" *preen* Now my posting life is complete. *g*
A lot has changed since those post-war years. They had the advantage of an economy that had been fueled by a rapid wartime expansion, from emergence from a deep depression to an engine that was turning out a ship a day. Those were heady days. The facilities were in those days modern. We were on top of the world, and were pretty much rebuilding it, with the sole inconvenience of the Communists.
We may not return to that time, but it doesn't mean that we have to sink into darkness, feeding off ourselves to keep the ever-increasing rolls of unemployed barely alive. I reject that idea. Our industries don't have to all be shuttered. They could be modernized (which would, yes, reduce the numbers of people employed). We may create a different but happy reality, with some of the old jobs and some new ones. Given the population increase, we need to find new jobs. Possibly in service industries with the aging population. But I don't think that a nation can live off service industries. You need to produce enough goods of some kind to create the wealth to pay for everything else.
As for your scenarios,
(1) An EMP or cyberattack might well happen. I just don't think the effects would last. People thought carpet bombs would destroy countries, but after the bombing is over, the populace emerges and tries to rebuild. I don't see retreating to a pastoral time. There are too many city people who don't have that option, and I, for one, like indoor plumbing and refrigerators. But a digital infrastructure that had to be rebuilt would indeed create jobs, and a better infrastructure.
(2) The thing that could affect oil and gas would be lack of refineries. It's been many a long year since we've built new ones, and unless something changes it's not economically possible to build new ones. I think that is a very real possibility. But I imagine we'd find a way to move goods. Coal, wind, sun, water - we used coal and wind and water before we had oil and gas. It would take more people, of course, until someone got smart and changed regulations and the possibility of legal actions to build more refineries.
(3) "Consumers migrate from mass-produced goods to old-fashioned hands-on handicrafts." Bwahahahahaha! Excuse me. *g*
(4) "Governments provide incentives or institute mandates for companies to employ more people in manufacturing." No! A thousand times no! That's the industry-destroying thought process of left wing progressives. You provide a means for companies to thrive and make money, and they will do that, probably requiring more employees. If you mandate jobs, you'll get what Obama got.
As for (5), well, as we learned in Jurassic Park, life finds a way.
I refreshed. You came back. Back to the salt mines. *g*
I think it is legal to have kitchen knives in the kitchen, and for chefs to transport them to and from work.
Isn't it odd that so many people die in car accidents and now car/truck terrorist events, and yet no one speaks of banning cars and forcing everyone to ride on public transportation, except in sarcasm? There might be some cities where that might fly, hopefully not one I live near. *g*