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Barry Posen, Ford International Professor of Political Science and former director of the Center’s Security Studies Program, argues that Russia’s invasion of Ukraine in 2022 qualifies as a preventive war and was motivated in part to thwart U.S.-led efforts to expand NATO in Europe.

Mihaela Papa, director of research and principal research scientist at CIS, discusses whether President Trump's threats to impose tariffs on BRICS nations in response to their efforts to de-dollarize signal a deeper shift in U.S. foreign policy.