“We are back in a period of superpower competition that will probably go on for decades. And that, if we're lucky, remains a cold war.” David Sanger, a Pulitzer prize-winning national security correspondent for The New York Times, joins Ian Bremmer on a new episode of GZERO World to offer a clear-eyed take on America’s adversaries. He’s out with a new book called "New Cold Wars: China's Rise, Russia's Invasion, and America's Struggle to Defend the West." The takeaway: we’re entering a new and increasingly unstable era of geopolitics where the US, China, and Russia will be vying for power and influence like never before. China's rise as a world leader and economic powerhouse, along with Russia's nuclear saber-rattling and increasing military cooperation, poses an unprecedented challenge to US dominance.