Doesn't matter. The countries with most chaos and internal strife gets a lot of practice fighting wars (civil war). Then the winner of the civil war, who's used to grabbing resources by force, and the one that has perfected war skills due to survival of the fittest, goes round looking for other countries to invade.
Historically, advanced civilizations with better production capabilities don't necessarily do better in war if they lack "practice". Sad but true. Maybe not in 21st century, but who knows.
Yeah none of that fever dream is real. There's no "after" a civil war, conflicts persist for decades (Iraq, Afghanistan, Syria, Myanmar, Colombia, Sudan).
Check this out - https://data.worldhappiness.report/chart. The US is increasingly a miserable place to live in, and the worse it gets the more their people double down on being shitty.
Fun fact: Fit 2 lines on that data and you can extrapolate by ~2030 China will be a better place to live. That's really not that far off. Set a reminder on your phone: Chinese dream.