 In Hillgruber’s opinion the German government had pursued a high-risk diplomatic strategy of provoking a war in the Balkans that had inadvertently caused a world war.Another theory was A. J. P. Taylor's "Railway Thesis" in his 1969 book "War by Timetable".In Taylor's opinion, none of the great powers wanted a war but all of the great powers wished to increase their power relative to the others.