The Orthodox Christian churches are ancient, yet they are embroiled in twenty-first-century geopolitics. Two Orthodox-majority states, Russia and Ukraine, are locked in a devastating conflict that seems to be reshaping the world order. In this episode, we talk with Dr. Samuel Noble, a historian of Orthodox Christianity. We ask him: Are we seeing the emergence of NATO and non-NATO strands of Orthodoxy? And have recent events proved that Samuel Huntington’s idea of an “Orthodox heartland” was prescient - or not?