The North Atlantic Treaty Organization is having a moment. The alliance dates back to the early years of the Cold War, and ever since, it has seesawed in and out of favor with Western leaders. But now, as Russia continues to wage its attack on Ukraine, NATO has assumed some of its old relevance. Guest: Mary Elise Sarotte, professor of Historical Studies at the Henry A. Kissinger Center for Global Affairs at Johns Hopkins University. She’s also a research associate at Harvard University's Center for European Studies. Her most recent book is Not One Inch: America, Russia, and the Making of Post-Cold War Stalemate. If you enjoy this show, please consider signing up for Slate Plus. Slate Plus members get benefits like zero ads on any Slate podcast, bonus episodes of shows like Slow Burn and Dear Prudence—and you’ll be supporting the work we do here on What Next. Sign up now at slate.com/whatnextplus to help support our work. Learn more about your ad choices. Visit megaphone.fm/adchoices