“If the Russians make the decision to invade Ukraine, this is an attack on the entire U.N. Charter. It is an attack on peace and security around the globe.”

American diplomat

Linda Thomas-Greenfield is an American diplomat. She served as the 31st United States ambassador to the United Nations from 2021 to 2025 under President Joe Biden, and earlier was the 18th assistant secretary of state for African affairs from 2013 to 2017. After leaving government service, she worked in the private sector as a senior vice president at the business strategy firm Albright Stonebridge Group in Washington, D.C. Her career has centered on diplomacy and international affairs, especially U.S. policy toward Africa and work at the United Nations.