All three views offer explanations while all three agree that the relationship between Hitler's anti-Semitism and the origin of the Final Solution remain controversial, although each author holds his own particular view.
I feel that the Final Solution meant more the removal of Jews from Germany and from German social and political life. Schleunes writes that in September of 1939, there were Jews who still remained in Germany, but were "excluded from the universities and schools, from the professions, and from the economy they were physically and psychologically separated from the surrounding German culture to whose making they had contributed so much" (Schleunes, 70). Hitler blamed the defeat of Germany in World War I on the Jews and based on his strong anti-Semitism as early as Mein Kempf (1923), he vowed that the Jews would be completely destroyed if they plunged Germany into another world war. Yet, I do not think he intended on their complete annihilation. I do not disagree for his contempt towards the Jews, but more importantly, I recognize his immense skills as a great leader. The Nazi's were not united in their individual attempts to force the Jews out of Germany. Under his style of leadership, Hitler demanded loyalty from his subordinates and their failure to come up with individual solutions to the Jewish "problem" led to the evolution, not the creation of the Final Solution.
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Browning's middle-of-the-road perspective offered me the best perspective to Hitler and the formulation of the Final Solution. Historians and Scholars now can only hypothesize what was going on in the mind of Hitler and his officers and try to answer any questions through the minimal documents and correspondences that exist. From what I can determine through the readings is that no one argues that it was Hitler who clearly and unambiguously ordered the Final Solution and the destruction of the Jews.