For me it’s more the complexity of today’s geopolitics that would make it impossible to call one a world war. In my example, is north korea engaged in the war? Not really, they are just lending (or selling) soldiers. Also Russia is not at war according to Putin, it’s just a military operation etc…
I don’t think another war will be called a world war anymore because of everyone’s ideas of a world war 3 being all out nuclear warfare.
For me it’s more the complexity of today’s geopolitics that would make it impossible to call one a world war. In my example, is north korea engaged in the war? Not really, they are just lending (or selling) soldiers. Also Russia is not at war according to Putin, it’s just a military operation etc…