Are we destined for the same fate as that other empire?
At the end of World War II, the US enjoyed geopolitical supremacy unmatched since the Roman empire. Friends and foes had been devastated by the war: millions dead, thousands of towns and cities destroyed, commercial and industrial infrastructure decimated. The only conflict on US soil was Pearl Harbor. Total war casualties were comparatively light. The US had the atomic bomb. American industry was intact, could quickly be retooled for production of civilian goods, and would face limited competition in global markets.
Power corrupts in direct relation to the degree of power; absolute power corrupts absolutely. That leaves only one direction for the occupant of a summit: down. That would be the proper starting point for some future Edward Gibbon, writing a magnum opus on the decline and fall of the American Empire.