A New Era of World War Has Arrived

A New Era of World War Has Arrived

Dr. Poast is an associate professor of political science at the University of Chicago.

By the time the war in Iran began on Feb. 28, the world was already fighting. The past two years brought more war — both within and between countries — than in any years since the end of World War II. A new normal of rising conflict had arrived.

Now, as the war in Ukraine drags on and the American and Israeli war against Iran is paused under a fragile cease-fire, we are watching another unwelcome phenomenon return to the global stage: the world war. Two large conflicts on different continents have become theaters for strategic competition between major powers. Each war’s dynamics have had a direct impact on the other’s, and both have dragged ancillary states into the fray. And while the combined scale and intensity of the conflicts falls far short of the two devastating world wars fought last century, they have arisen from the same dangerous reflex: competing nations fully embracing military force as the first and primary means of exerting power.

Russia and the United States went to war for different reasons. President Vladimir Putin of Russia sought to expand his territorial reach and regain land that — in his mind — belongs in the Russian sphere. The stated objectives for the United States in going to war against Iran varied, but President Trump has consistently said that Iran can’t be allowed to acquire a nuclear weapon. (Israel, America’s partner in the war, shares that objective, but has political aims of its own, a reality that could scuttle the cease-fire altogether.) Still, both Mr. Putin and Mr. Trump believed success would be easy and that their goal justified virtually any level of violence — even if it broke the bounds of international law.

In a few short weeks, the conflicts in Ukraine and Iran became expressions of the great power competition underway. In both theaters, Russia and the United States have backed each other’s adversaries. The United States continues to provide arms, intelligence and planning to Ukraine in its fight against Russia, and Russia was reported to be doing the same for Iran by providing targeting information and mapping on U.S. military positions and sending drones to Tehran. While the United States and Russia aren’t directly firing on each other, the powers have essentially loaded and pointed the guns being fired by others.

Each war has affected the other. The shock to global oil prices induced by Iran’s closure of the Strait of Hormuz has become a financial windfall for Russia, both in higher prices for its own oil and through the easing of sanctions on that oil by a Trump administration desperate to lower global prices. As attention and resources are diverted to Iran, Russia has launched a spring offensive aimed at consolidating and expanding its territorial gains in Ukraine. Ukraine, meanwhile, has offered the expertise in drone defense it has acquired in its fight against Russia to the United States and the Arab nations being targeted by Iran.

Both conflicts have pulled in other countries. In Ukraine, Russia’s war effort has long been enabled by the economic and technical support of China, the direct manpower contributions of North Korea and drones from Iran. European allies have played an increasingly important role in helping arm Ukraine, even taking the lead in that effort over the past year. And while NATO countries have not answered Mr. Trump’s call to help keep the Strait of Hormuz open, last month NATO-run missile defense systems shot down Iranian missiles directed toward Turkey. Iranian missiles aimed at several Gulf states have dragged those nations into the fight, while Israel has attacked Hezbollah in Lebanon, and the Iranian-backed Houthis in Yemen have launched missiles at Israel.

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