From Ukraine last year, to Nagorno-Karabakh last month and now Israel, it really does feel like there's a trend of people becoming more comfortable with using large-scale unilateral violence to solve problems. That trend itself greatly worries me; each instance normalizes and legitimizes the next.

Co-founder of @buidler. Building /community-notes

I think the war won't happen in big countries. It's more likely to occur in intermediate countries like Ukraine. 

And I haven't thought about any factors that could stop the war. What conditions do you think would be needed to end it?

That all depends on how "world war" is defined. Plenty of opportunity of pretty brutal outcomes while still staying within the confines of "the USA and EU only participate by providing equipment, so it's not *technically* a great power war".