Comment by magicalhippo

> You don’t tend to go to war when your economy is so intertwined that war is the economic equivalent of a mass casualty event.

That is after all the core motivation[1] behind what became[2] the European Union:

The solidarity in production thus established will make it plain that any war between France and Germany becomes, not merely unthinkable, but materially impossible.

[1]: https://web.archive.org/web/20230516193200/http://aei.pitt.e...

[2]: https://en.wikipedia.org/wiki/European_Coal_and_Steel_Commun...