People underestimate the impact of the US on the stability of the modern world.
Has the US screwed up a few countries a few times, sure. Iran, certain Latin American nations, Afghanistan are not the best examples.
But compare the peace across the majority of the world since 1945 vs the constant European and Colonial Wars of the 17th, 18th and 19th Centuries.
This is purely down to the US as a Super Power, and their drive to encourage Democracies, especially post WW2 in Europe.
Admittely the Cold War played its part, but it was a Cold War of Democracy vs Communism, and US was the standard bearer for Democracy.
Because of the US for the better part of 100 years, the idea of how to be rich and successful in the world was - Democratic elections, a free capitalist economy and a free press that could report the truth.
Compare that to the pre-WW2 where the press and freedoms wererestrcited, and post WW2 Authoritarian regimes such as Russia and China.
If you are the wrong person in these countries, you disappear. The wrong ethnic group, the wrong religion, the wrong sexual orientation, you are targetted and removed.
The press is restricted (and in recent times, the Doctor that discovered the Corona Virus was silenced by the Chinese government, allowing to spread further... extremely stupid).
Despite all of its faults, the fact we live in a world as free as it is is down entirely to the US.
If the US falls, expect more regional wars, more violence, more refugees and the slow death of Democracy. New Tyrants will rise and the enlightment will be nothing but a memory.
Don't forget, in 1984 shows us a world of unrestricted Tyrants messing with history, believe me we do not want that.