The first electric light, the carbon arc, was invented by Englishman Humphry Davy. Even the filament bulb was not an Edison invention per se, he merely improved on the design of Canadians Henry Woodward and Mathew Evans. It was Edison who made it cheap enough to be practical. T A Edison's real specialty was patenting other people's ideas, like those of Nikola Tesla.
Jet aircraft were invented by Hans von Ohain, the first being the Heinkel He 178 and the first fighter jet being the Messerschmitt Me 262. The brightest moment in Nazi Germany's history, perhaps? (Personally I'd credit Volkswagen with that epithet, it was nicknamed "Hitler's revenge".)
Related to the end of slavery, which Stu Spelling Bee already mentioned:
In ways I've read about, and probably countless ways no one even knows, Harriet Tubman (and probably countless others less-well-known who did similar things as far as slavery) created great hope.
Auburn is in central NY on the east side of Cayuga Lake, near Cortland, Geneva, Ithaca, and Syracuse.
This post was edited by Stu Spelling Bee at February 14, 2020 9:49 AM MST
I'd have to go with the ending of slavery and the various civil rights movements.
Probably also the Declaration of Independence and the Constitution - because, in general, they've caused far more good than harm.
However, justlike Australia, the very existence of the country is predicated on the invasion and theft of land that formerly belonged to indigenous peoples. The murders, massacres, rapes and other atrocities have still not been through any process of reconciliation, justice or compensation. Many injustices are still being perpetrated.
As for all the wonderful inventions - some of them could now be viewed differently in the light of their need for fossil fuels and the resulting climate change.
The USA is an amazing country. Being so populous, its brightest people must rise through a highly competitive environment. So that when they reach the top of their fields they prove to be among the brightest in the world. Their gifts give endlessly to humanity and the world in uncountable ways.
This post was edited by inky at February 14, 2020 7:34 AM MST