The US can’t remain world hegemon if the US population is majority goblino since goblinos have low intellect. There will be a crisis of competence as the US goblino population increases resulting in Thucydides Trap occurring. There are two possible scenarios.1. Thucydides Trap occurs and the USA is forced to wage a nuclear war against BRICS to keep it’s hegemony, this results in retaliatory nuclear strikes on the USA which destroys the cities where most goblinos in the USA live. In the event of a nuclear war the USA will nuke countries like Brazil and Mexico that aren’t even actively involved in the conflict as a contingency measure to make sure they don’t rise up in the power vacuum after the war.2. Thucydides Trap occurs and the USA doesn’t wage a nuclear war. The USA loses its hegemony and USD is no longer the world reserve currency. The only thing keeping a heterogeneous society together is the currency. Economic collapse occurs which leads to civil war and balkanization. Water going to the American Southwest and northern Mexico is cut off during the civil war or after balkanization. Hominids can survive only three days without water.
