Regardless of all the tactical decisions that Hitler could of made. Even If he Invaded England and not Russia, How long would he have lasted as a leader? There is strong evidence of Parkinsons, Drug addiction and possible Epilepsy. Sure, as History unfolded the way it did, the growing pressures of a losing war weighed heavily on him physically and mentally however, even if the war w/ Russia does'nt happen and Sea Lion was a success, would he have been around after much longer after 46'???