Orthodox historians argue that Hitler was a master planner who intentionally started World War II due to his strong beliefs on fascism, expansionism, and the supremacy of the German State.[1] Revisionist historians argue that it was an ordinary war by world standards and that Hitler was an opportunist of the sort who commonly appears in world history; he merely took advantage of the opportunities given to him. This viewpoint became popular in the 1970s, especially in the revisionism of A. J. P. Taylor.