The United States brought freedom to billions of people.
If the USA did not exist then europe would be working on ww4 by now.
Had the USA not butted into World War One, the war would likely have ended in a stalemate.
Thus, no Communist revolutions in Hungary and Germany in 1918-19 (and perhaps a few other places). Germany, Austria-Hungary, Ottoman Empire still intact. Bolshevism better contained.
If no Communist upheavals, no fascist counter-reactions. No Nazis, no World War Two, no Holocaust. Possibly no Israel, but perhaps a price worth paying to avoid the Holocaust.
With no World War Two, British and French Empires possibly still intact. No wars in Algeria, Vietnam, and elsewhere.
More importantly, with no Hitler or Holocaust, no European guilt over "racism" and "colonialism," thus no guilt-ridden need to bring in migrants.
That's how the world might have turned out had World War One ended in a stalemate, had the United States not butt in in 1917.
(And if the U.S. had followed a purely neutral position from the start, German U-boats would not have been an issue.)
Had the U.S. remained neutral, things would have been better for us as well as Europe.
But even better if World War One were avoided entirely. Had that been the case, no Bolshevik Revolution. The Tsar was an autocrat, but he wasn't a genocidal monster.
How often I wish I could go back in time and convince the European powers to avoid that most suicidal of wars. The war that set the West on a path of self-destruction.
More likely, WWII would have never ended. It would simply be a constant state of combat between constantly shifting alliances.