it would still be the world's top superpower... Interesting. Extremely unlikely, but possible. The great impetus to the US being 'top dog' was the huge profits

it would still be the world's top superpower... Interesting. Extremely unlikely, but possible. The great impetus to the US being 'top dog' was the huge profits the US made from World War 1 where all of the British and French money went. Without WW1, WW2 might not have happened the way it did either. That leaves a slowly growing US that might have been less 'exceptional' and more long-lived. More like the much longer British rise and fall over several centuries than a short-lived one-century-long rise and fall.