Most countries don’t have the resources in their borders to produce everything they need. They trade for it.

You can’t trade with countries that are unstable. You also can’t trade if the trade routes are under fire.

The best example of this today is Hormuz but it extends beyond that single resource. Think about how many countries contribute to make a cpu, and what would happen if that got disrupted. Suddenly all the mechanization advancements in farming become a little more expensive, along with everything else.

China is experiencing some of the worst labor shortages today, and Taiwan will be within the blast radius of geopolitical unrest. Every advanced cpu is assembled in Taiwan, and depends on resources sourced from nearly ever country.