Well, there was actually no need for Hitler to go to war at all in 1939, Ebbie. What about that possibility? What if he had simply rebuilt the German economy and armed forces, but stopped short of attacking Poland or anyone else? What then?

The other powers in Europe would have been worried about a vigorously restored Germany, but would they have gone to war if Hitler did not?

As for the persecution of the Jews, that was a mad idea, but Hitler found it very useful in whipping up support for the Nazi Party, because anti-semitism was common all over Europe at that time, not just in Germany.

As far as winning the war once it was underway....hmmmm...

A fairly long shot, I'd say. I don't think there was much chance of Hitler ever conquering the UK...but if he had put a really serious effort into taking North Africa and had occupied Egypt, siezed the Suez, and dominated the Med...then it's quite possible that he could have negotiated peace with the British at some point and the war could have ceased with neither side losing, in effect.

In the meantime, any number of other things could have happened. The Russians might well have attacked the Germans at some point if Stalin felt the time was right. They had enormous forces, getting stronger all the time, and they were quite optimistic about the effectiveness of those forces. Among other things, for example, the Russians had far and away the best tanks in the world by 1941 (the T-34 and the KV-1). What they did not have was a highly experienced force using the new Blitzkrieg tactics. The Germans used such a force to great effect when they invaded Russia. It won many great victories, but it couldn't win that war, because Hitler bit off more than he could chew.