The British Empire fell, calling their colonial holdings full of savages, brutes, and wogs. The Aztecs fell from a pandemic suddenly.
Japan's isolationist policy and later joining the racist 3rd Riech led to the fall of its Empire. A recent revival of a Stalinesque Russia will become a footnote in an oligarchic fall. China is playing a long game slowly. Its future is full of questions.

Rome had the child (Flavius Honorius Augustus) and the US has Trump.