Earlier quoted context omitted.
It's an economic theory - https://en.wikipedia.org/wiki/Mercantilism The general idea is that when you buy stuff you're losing wealth so if you never buy anything then you never get poorer. Since we constantly dig gold up from the ground we still get richer over time even if nobody buys our stuff. This is also why its importantly to gain colonies (Greenland/ Canada) or mineral rights from other countries so that the…
My main concern is that de-globalizing trade will remove a large barrier for real kinetic war. Bombing your economic partner is generally a dumb move, and that has been pretty nice for humanity in the last ~50 years.
Case in point, the EU with its internal markets.