I think it would have been in everyone’s interest, if no one had gotten involved in WW 1. I don’t think it accomplished much, except to get millions killed.
I also don’t think it would have prevented the Bolshevik Revolution. Tsarist Russia was ripe to fall one way or the other, and a defeated France would have been another likely spot for the Marxist fire to break out.
Britain claimed that it was forced to act in 1914 to secure its borders and the Channel ports, but in reality its borders and Channel ports became less secure when it engaged Germany.
The Russians and Serbs had a legitimate gripe against Germany and Austria-Hungary, who in turn had a legitimate gripe against the Serbs for assassinating Archduke Ferdinand.
Drawing Italy, India, the UK, Australia, Turkey, and France into that war made little sense...dominoes of paper treaties costing millions of lives, and the intervention by Japan, Canada, and the U.S. made even less sense (though far lest costly overall for them, at least).
Worse, besides those geopolitical mistakes, countless tactical mistakes were made such as how to combat submarine warfare, gas warfare, entrenched machine guns, aerial combat, etc.
France suffered 64% national casualties from the above errors...its warrior class was wiped out and its militant culture changed forever, though it didn’t recognize that culture-shift until after WW2.
Argentina stayed out of that war and prospered by selling war materials.
China entered WW1 on the side of the Allies, but after the war all of the German ports and bases in China were instead given to...Japan.
This enraged the Chinese. Students such as Mao Tse Tung and Chou En-Lai rallied mass demonstrations in Tiananmen Square against the results of the peace treaty at Versailles, and formed the Communist Party in China when their demands were ignored by the Allies.
Worse, giving the Chinese ports to Japan merely stoked Japan’s territorial desires instead of enamoring Japan with its Allies.
Combined with the Bolshevik Revolution in Russia, one can quickly see that not only was entry into WW1 catastrophic, and not only was the execution of tactics in the catastrophic, but also that the conclusion of WW1 was so badly botched that civil war in China as well as global war such a short time later circa 1939 became inevitable.
The Schlieffen Plan was devised nine years before WWI started. And what justification was there for violating Belgium’s neutrality?