This article argues that documents have always been central to the debate on the origins of the First World War, from their first publications in the early weeks of the war, in the so-called Coloured Books, to the official document collections on which so much of our knowledge of the period is still based. For nearly 100 years, we have been engaged in the hunt for the truth about the outbreak of the war, and documents have been seen as the key to unlocking this truth about the past. Not surprisingly, documents (many of them only recently discovered by Fischer in the archives by the time he wrote Griff nach der Weltmacht) have been seen as the key to unlocking the truth about the past. And yet, the long debate on the origins of the war has t...