While a longer view would probably put The Great War (aka WW1) and before that, the American/French Revolutions, and before that The Industrial Revolution and The Enlightenment, as direct causes which lead us to the depraved world we are in today, the most serious decline for America was the 1963 coup de etat where our leader was murdered in cold blood on live television for the entire world to see.
This is really the original "conspiracy theory" and that phrase is not coincidental--the American Deep State 100% conspired and colluded to cover up this murder (that's not debatable at all) and the CIA created the phrase "conspiracy theory" in the wake of the murder in order to discredit and ridicule those discovering their crimes. The reason you hear the phrase "conspiracy theory" today, is because the CIA was caught conspiring and made up the phrase.
This is a long topic, with many theories, but if you want a good introduction to the evidence, I highly recommend the Who Killed JFK Podcast by Rob Reiner.
It's important to remember that the official conclusion and current government position is that there was a conspiracy to assassinate the President.
I've listened to about half and it is excellent. He interviews original sources, and while a lot of it I knew already, it's very well organized and presented coherently, and it's good to see all the evidence layed out at once.
Listening to this evidence again today, there were several points where my mouth dropped open and I just said "Well of course, because of Israel!" Very revealing to listen to the story again with an eye for the JQ.
Yes, Rob Reiner is Jewish, and while I'm not expecting him to mention Israel, he otherwise doesn't pull any punches, and gets you 99% of the way there. The only unanswered question is *WHO* in the deep state started this ball rolling and *WHY*, but he will cover the how and the when and everything else.
The most likely theory for who gave the order is powerful Zionist Jews because a) JFK was the LAST American president to stand up to them EVER, b) he was aggressively going after them for stealing American nukes, c) Jews have controlled America ever since which is pretty serious circumstantial evidence and d) the Patsy, Lee Harvey Oswald, was killed (on live tv again) by Jew striptease degenerate (((Jack Rubenstein))) . Anyway, a few years after the assassination is when we first started hearing about the Holocaust, and then it's been a pretty steady fall downwards since then.
And Jew or no Jew, America was not dominated by Zionists in 1963 so there were traitorous goys involved in the killing of our president.
Richard Nixon said that America likely peaked in 1969 during HIS presidency (not something most men would be willing to admit) and you can browse just about any metric and see how our way of life has been in free fall since then.
Throughout history, whenever a head of state was assassinated, a coup, revolution, or overthrow of power occurred. Somehow Americans are too stupid to see how a quiet coup happened right under their noses.
Listening to this podcast with fresh ears, and hearing things like (((Arlen Specter)))'s Magic Bullet Theory or the "Oops we lost the president's brain" excuse, or dozens of other things, really is almost laughable. It's just so obvious in hindsight that America was subverted and overthrown that day, and it will never be the same again.