If there is any country in the world that can make national self-sufficiency work, it's the USA. The economy is still the largest, and it is also the most diverse. The USA has a large and varied geography from which to generate materials. The population is large.
China is far less capable, and nobody else is even close to being able to reach national self-sufficiency without going back to a very primitive meager existence.
China is far less capable, and nobody else is even close to being able to reach national self-sufficiency without going back to a very primitive meager existence.