On April 6th the newspaper Kurier published an interview with Archduke Karl. He says that there is not one guilty party for the First World War.
Karl Habsburg: "Es gibt keinen Alleinschuldigen am Ersten Weltkrieg" - KURIER.at
Although that has been the consensus among historians for a while, recent publications in that field tend to lie more and more blame with the Serbian government, who sacrificed the peace in Europe for nationalistic reasons. Only this time what was supposed to be a 4th Balkan war escalatred into a world war (see among others 'World War One. The Global Revolution by Lawrence Sondhaus, 2011).
The article however focusses on the guilt - or innocence- of the Emperor Franz Joseph in this matter.
The archduke also recalls that his grandmother Empress Zita still shared some memories of the war, his father only remembered parts of the final years.