> If everyone cuts trade for moral reasons, then there's no incentive for us not to point nukes at each other again.

I don't agree with OP but this is actually a pretty common talking point around the benefits of globalization. If you depend on some other country for some essential resource (e.g. natural gas) you're less likely to want to go to war with them because it would be quite inconvenient to suddenly have half your population freezing in the winter.

Here's some research from Cato that shows that trade interdependence generally promotes peace https://www.cato.org/research-briefs-economic-policy/does-tr...