“It’s great for the general store owner, who now gets to sell all the needed supplies to both families to rebuild.”
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Sounds like it may be good for the store owner but the net result is that both families are ruined and generate far LESS total trade with anyone in the future. Any benefit derived from war that accrues to any one person, company or country is always more than offset by losses to someone else. For every “Daddy Warbucks” there are thousands of ruined or ended lives.
That’s why it’s stupid to *START* a war to boost economic growth...
...but not stupid to profit from wars that already are underway.
Once a war is underway, there will be “families are ruined and generate far LESS total trade with anyone in the future”... and there isn’t much a business can do to stop it.
So all you can really do is take the money that they so desperately want to give you in return for the supplies they need.