In working together on two challenging new documentaries - South of the Border and the forthcoming thirteen-part, thirteen-hour Forgotten History of the United States series for Showtime - filmmaker Oliver Stone engaged with author and filmmaker Tariq Ali in a probing, hard-hitting conversation on the politics of history.

Their dialogue brings to light a number of forgotten - or deliberately buried - episodes of American history, from the US intervention against the Russian Revolution to the dynamic radicalism of the Wobblies; how Henry Wallace's nomination for the vice presidency was deliberately thwarted by Democratic Party machine insiders, to the ongoing close connections between various US presidents and the Saudi royal family.

For Stone and Ali - two of our most insightful observers on history and popular culture - no topic is sacred, no orthodoxy goes unchallenged.