I'll add to this by saying that globalization works as well as it does because the average person would suffer dramatically from a major war and the resulting breakdown of global supply chains. People who are wealthy enough to move anywhere in the world (including to a military-grade bunker somewhere remote like New Zealand) if their current domicile is negatively affected don't have as strong of an incentive to maintain peace.

As a corollary: people who, because of geography, are unlikely to suffer any traditional or novel military consequences of a war in country <X> (e.g. Americans w.r.t a war in the middle east) are only going to have moral reasons for avoiding such a war, other than the risk to members of their family and friends. This makes the risks from such countries significantly worse than those who are militarily at risk should they choose to attack another.

Of course, none of that stops terroristic responses to war, but those by themselves affect relatively small numbers of people (or have done so far; obviously terroristic use of nuclear weapons would change that).

We can see all of this in the voices of the segment of the American population that is "all in" for the war in Iran, safe in their belief that they will suffer no militaristic consequences from it.

> People who are wealthy enough to move anywhere in the world (including to a military-grade bunker somewhere remote like New Zealand) if their current domicile is negatively affected don't have as strong of an incentive to maintain peace.

Eh, if you’re a billionaire factory owner and landlord, the kind of war that would send you to a military grade bunker in New Zealand will be bad for your factories, properties, workers and tenants.

Also, a man can only go to the opera if the singers and orchestra aren’t busy scavenging for food or fighting mutant wolves. And the same is true of most other entertainment, fine dining, fashion and suchlike.

Sane wealthy people gain nothing from a world scale war, and in fact would face a big loss in quality of life.