How would the pre ww1 artistic trends have developed without the disruption of the world wars? Would futurism become even more important? Does modernism still arise? What about art deco?
No "Lost Generation" with it's extreme disillusions and anger.
And no dadaism. Which may or may not mean that absurdism as an artistic trope is considerably less prominent throughout the rest of the 20th Century. This could actually butterfiy away a lot of the cultural items we take for granted on an everyday basis, eg. Steve Martin's arrow-through-the-head.