This is a question has been bothering me as someone who’s country was colonized by the British Empire. We were taught about it in schools and how it lost power over time but never how the USA came to take its place especially over such a short compared to the British Empire.
my uneducated guess would be guns/military and computers.
WWII left much of Europe and Asia in shambles while the continental US was isolated from the fighting and swooped in to fill the power vacuum.
It was simply money all along