The causes of World War I, the effects of Britain's entry and the alternative paths history could have taken are debated.

In this fascinating take on the First World War, Harvard historian Professor Niall Ferguson argues that Britain?s decision to enter the war in 1914 was a tragic and pivotal mistake that unleashed an era of totalitarianism and genocide around the world. He poses the question ? what would Europe have looked like if Britain had stayed out of the war? Would Stalin have come to rule Russia? Would Hitler have ended his days an obscure postcard painter in Munich? Using cutting-edge graphics, illustrative stories and a studio debate with leading WW1 experts, Ferguson presents the innovative argument that Britain?s decision to intervene was the biggest error of modern history.