I’m going to put up a contrarian view — the world as we know it would not have existed if there wasn’t a World War one.
1914 - the world is still under empires.
No WWI then most likely Central Europe gets Germanized/Russified. And neither of those powers gave any reign to individual liberty.
No WWII - or at least no Darwinian-based race ideology wars.
The world would be completely, utterly different - not necessarily good nor bad, but just different
WWI should have just been Germany, Austria-Hungary and Russia.
It was France’s alliance with Russia that got things kicked off. Because France didn’t like the “new kid on the block”.