The US elites regard China as their primary challenge. But—with a military defeat of China and regime change in China both currently out of reach—they regard the whole globe (and even outer space!) as the chessboard on which this challenge plays out. Many countries around the world have geopolitical significance: as potential military allies, sources of raw materials, trading partners, transport conduits, or political supporters or opponents in international forums or public media. They can play such roles in support of the US and/or in support of China. The key goal of US foreign policy is to keep these other countries reliably supportive of the US and to maintain the ability to disrupt their support for China.
The recent outbreaks of violence in Ukraine, Venezuela, and the Middle East can be seen in this context. These military confrontations have disrupted the support China derived from Russia, Venezuela, and Iran. They have reminded everyone that in international relations, violence remains the ultimate decider (“the law of the jungle”) and that the US—with its ally Israel—is able and willing to inflict much more violence, especially on civilians, than any other state. These military confrontations have greatly diminished the weight and prestige of international law and morality as restraints on state conduct (“with survival at stake, one cannot be expected to fight with one hand tied behind one’s back”). And they have put the leaders of all states on notice that the US is willing and able to undermine and even to kill them if it regards them as an obstacle to US global dominance. In this way, other countries, including those of the global south, are drawn into the intensifying international contest for power.
The old concept of balance of power has no role in this contemporary contest. It had its place in a bygone world that ended a century ago—a world in which a handful of roughly equally powerful states (Britain, France, Austria, Germany, Russia, later joined by the US and Japan) were competing. The balance among these states is thought to have persisted because, whenever any one of them was on the verge of becoming dominant, the others would find it in their interest to join forces to constrain it. This collective leadership (“the concert of Europe”) ended definitively with WW2, which brought the US into a position of global dominance, with the Soviet Union and later China as distant runners-up. While a new balance of power—including the US, China, India, the EU, and Russia, perhaps, joined by Brazil and Indonesia—is possible, the US will do all it can to prevent its emergence.