Could the shared historical memory of March 1 ever be a source of unity between North Koreans and South Koreans? In this fascinating episode of The Crack-Up series that explores how 1919 shaped the modern world, Professor Kyung Moon Hwang discusses the complex birth of Korean nationhood and explains how both North and South Korea owe their origins and their national history narratives to the events swirling around March 1, 1919.