 His approach is to emphasize structural factors, and then bring in Hitler's personality by arguing that the top leadership, the middle leadership, and even the lower ranks of the Nazi movement devoted themselves to carrying out the Fuehrer's intentions, whether or not he put them in writing.That is, Kershaw depicts Hitler's leadership as charismatic, which emphasizes its profound influence on the audience, and so the audience—and thereby the German society as a whole—was acting under his very broad command.American historian John Toland (born 1912) wrote a biography of Hitler (1976) which was based on an extensive amount of original research, such as previously unpublished documents, diaries, notes, photographs, and interviews with Hitler’s colleagues and associates.