The Saudis, backed by the Americans, have been waging a war against Yemen since 2015, causing massive civilian casualties as well as famine and a cholera epidemic. How did Yemen get here? Yemen’s modern history is fascinating and overlooked, and few are aware of the Marxist republic that existed in South Yemen from 1967 to 1990. To help place recent events in their historical context, Rania Khalek was joined by Helen Lackner, a research associate at SOAS, visiting fellow at the European Council on Foreign Relations and the author of several books, including, “Yemen in Crisis: The Road to War.” And she has a forthcoming book “Yemen: Poverty & Conflict” (Routledge).