The full story of the first and only time American and Soviets fought side-by-side in World War II At the conference held in in Moscow in October 1943, American officials proposed to their Soviet allies a new operation in the effort to defeat Nazi Germany. The Normandy Invasion was already in the works; what American officials were suggesting until then was a second air front: the US Air Force would establish bases in Soviet-controlled territory, in order to "shuttle-bomb" the Germans from the Eastern front.

"Brilliant, wise, profound and persuasive. Common Sense for the 21st Century will come to be recognized as a classic of political theory."—George Monbiot, via Twitter

The creator of the wildly popular award-winning podcast Hardcore History looks at some of the apocalyptic moments from the past as a way to frame the challenges of the future.