I agree with much of what @ragingloli wrote, and I found it very interesting.
I think America would be fairly similar to what it is today, just to be America centric for one minute. I don’t think Hitler would have made his way across the Atlantic. I’m sure I wouldn’t have a Porsche in my garage.
My guess is the Jewish population would be smaller than it already is. More people who were helping the Jews would be dead also, and their descendants never would have been born. The disabled possibly would have continued to be systematically aborted or murdered. Maybe by now there would have been more push back against some of these genocides Hitler was committing, but regarding the Jews I don’t think there would have been much to stop it. He killed 30% of the Jewish world population. A huge chunk. I think we were 11 mlion after the war ended. We just now in the last few years got back up past 18 million. If he had dwindled our numbers down even more in Europe, there would be fewer in other parts of the world too, since many Jews left Europe after the war. Who knows if Israel would be the same? Who knows what the Middle East would be like without Israel.
I guess there wouldn’t have been an East and West Germany. No wall. Even more blondes in Germany. I can’t help it, I see a blonde with high cheek bones who is German, and I wonder if they are grandchildren of the baby factories. I know someone who says he is.
However, I do think Hitler would not have ruled for 40+ years. Not like Castro in Cuba, or a closed society like North Korea. The German people, and especially many people in other countries that would have been controlled by Germany, I think eventually would have gotten rid of him. As technology and communications developed more and more, he would have lost his control hopefully.