In most major works of history, the "intelligence dimension" has been badly lacking. Enter Calder Walton, a scholar at the Harvard Kennedy School and author of "Spies: The Epic Intelligence War Between East and West." The Cold War did not begin after 1945, Walton argues, but rather the Soviet Union had been at war with the West since its inception, waging an intelligence onslaught designed to steal government secrets and commercial and technological advancements. And the Cold War did not end with the USSR's disappearance. The Kremlin continued to attack its enemies in the West. In this episode, Walton discusses his riveting book and its relevance to the new U.S.-China conflict. For the past century, intelligence services authored stories of human drama more compelling than anything found in a spy novel, replete with assassinations, election meddling, and nuclear close-calls.