The First World War: Was it worth it?

Did the outcome of the First World War justify the enormous loss of life? We ask two leading historians, Gary Sheffield and Richard J Evans, to put the case, both for and against

British troops go over the top of the trenches during the Battle of the Somme, 1916. The Somme was one of the bloodiest clashes of the First World War, causing more than one million casualties over five months. (Photo by Paul Popper/Popperfoto/Getty Images)

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