It's interesting to see videos of the borders of the world over time. Contrary to intuition, the rate of shifts (often due to warfare) were accelerating over the centuries. Then, suddenly, since 1945 everything comes to a standstill among developed nations excepting the relatively peaceful internal collapse of some communist nations. 1945 of course being when we first detonated a nuclear weapon over another country, twice.
The thing that's stopped countries from war has not been trade, amicability, social evolution or anything besides nukes. The reason no developed nations ever go to war is because there is no win condition. If one side or the other is facing significant losses, they will retaliate with nuclear weapons. If that doesn't end the war immediately - it'll shortly result in a flurry with both countries effectively ending each other instead. Mutually assured destruction, as a term, always felt like it somehow missed some of this nuance!
The thing that ought actually concern people is the development of anti-missile technology which is rapidly advancing. Highly effective anti-missile technology would signal the return to war. This is why countries such as Russia have been developing things like 'Tsunami Weapons' [1] - a nuclear weapon designed to be detonated under the ocean that could generate radioactive tsunamis thousands of feet high. If that sounds difficult to believe consider that we have nukes in excess of 100 megatons now a days. Hiroshima was 16 kilotons - in other words about 6,250 times more powerful.
The point of this being is that I think this will help create a multipolar world and industry - imagine e.g. a new Chinese OS competing against Android/Apple. But I do not think that the current status quo of the world has been playing a meaningful role in deterring war anymore so than a change to a more multipolar world will advance it. I think it's simple. When we can't overcome nukes, we won't have "outright" war - creating an allowance for proxy wars like Vietnam where no nuclear participant's sovereignty is at stake. When we manage to overcome nukes, we will have outright war.
[1] - https://www.rferl.org/a/russia-launches-new-submarine-believ...