Congress passing the Taft-Hartley act and then overriding Truman's veto of it to enact laws to cripple unions (which made important union activities illegal, like solidarity strikes, jurisdictional strikes, and mass picketing) and basically completely fucked up unions, before Reagan went ahead and fucked them up even more than previously thought possible again
Created Wilsonian doctrine that led to forever wars
Segregated the federal government.
Wrote Southern Revisionism
Fostered the second founding of the KKK
Erected a bunch of statues of traitors that specifically said to never erect statues of them.
Probably caused Lenin, and Stalin thereby causing Hitler and WWII plus a host of downstream knock-on effects such as The Cold War and the demonization of socialism and communism in the US.
Robbed us of Teddy's third and fourth terms in office.
Good thing we have this expert history book reader to tell us that the first thing the UNITED STATES did wrong was import slaves into the ENGLISH COLONY of Virginia in 1619
I'm not in the business of arguing with dumb fucks. Clearly when they declared indepence from England they could have freed the slaves or you know sent them back to England, because you think it was the king who owned the slaves. Do you understand or should I draw you a picture with crayon?