"The USA also had other great achievements in the last 100 years:" ................... "- helped turn the tide against the German military machine in WW1;" ...................
Why was that a good thing? Germany had already offered to call the war off in 1916 in an offer to the British in recognition that the whole thing was just a bad idea gotten completely out of hand. This was from a position of strength as no allied soldier had set foot on German soil, so a quite magnanimous gesture. It was to be on a status quo ante bellum basis ie. everything to go back to what existed before the war. The British however, managed to drag the US into the fight via staged outrages such as the sinking of the Lusitania. Traditional (and sensible) americans wanted to avoid entanglements in foreign wars but were shouted down.
Once in, they got a seat at the table for the drafting of the Treaty of Versailles which loaded the whole cost of the war onto Germany(loser pays all)which virtually guaranteed the rise of someone like Hitler. People will not stay screwed forever and will find someone to rectify unjust situations.
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"- helped turn the tide against the maniacal German Facist regime in WW11,a regime that tortured and murdered millions of innocent people;"
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With the aid of a maniacal Communist regime that tortured and killed millions of innocent people, including but not restricted to the killing of between 6 and 10 million Ukrainians in 1933 by starvation for the crime of resisting collectivization. In addition to that were the "normal" mass killings, gulags etc that communists are prone to..
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"- saved Berlin and its inhabitants, from the scourge of despotic Soviet Communism, a regime that had no hesitation in torturing and starving to death millions of its own people;"
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A situation that they themselves created by allying themselves with "Uncle Joe" Stalin.
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"- defeated the despotic Japanese military machine, a machine that tortured and killed millions in the name of Imperial Japan;"
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A Japan that was keen to avoid war with the US and had to be goaded into it by way of embargoes and freezing of its financial assets in the US. The problem for the US was how to get into the war with Germany, as they were avoiding attacking any US ships supplying Britain. The american people were not keen and so had to be manipulated into it. Japan solved all problems as the Japanese had a treaty with Germany,and the US could get in that way. Push the japs, or rather slowly strangle them with embargoes, and any self respecting people will choose to go down fighting rather than capitulate.
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"- introduced the real meaning of Democracy to the world, although unfortunately, for quite some time, it did not cover its non-white inhabitants;"
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By the time it was in a position to introduce its version of democracy to the world, it was already corrupted and on its way towards empire. That was something the original framers of the constitution would have been a wake up to but the chance to take over Britain's role(and empire)at a discount was an opportunity too good to ignore. As for democracies, the Greeks of course invented it in a formal sense, and the Swiss still have the real thing.
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"- is one of the best and successful countries on earth for medical and scientific research;"
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How much of that was a result of all the patents and research papers (tonnes) that they snaffled at the end of WW2 from the Germans. They wouldn't have gotten to the moon without the Germans, via Operation Paperclip. Werner von Braun didn't grow up on the streets of New York.. The americans didn't even know how to build freeways till they got to Germany and saw the autobahns,which is what gave them the idea to build their interstate road system.
Just to speculate from hindsight, if Britain had been forced to call off WW1, not lose,(but not "win" either) and simply recognise a bad decision rather than compounding it, then the Nazis and Hitler wouldn't have happened, the Soviet Union may not have been created from the chaos of WW1. Communist revolutions may not have been seen as a viable option, therefore perhaps no communist China. The US could have remained more isolationist and truer to their constitution and developed in a non imperial way, honouring the advice of one of their founders "to not get into foreign entanglements". Britain would have lost her empire at a slower pace and perhaps without the upheavals that premature independence caused. Anyhow, all speculation but the last century was not the best of all possible centuries...
