How do you think the world would be if WW1 and WW2 had never happened?

Obviously, WW2 was a direct result of WW1, so without the first one, there is no reason for the second one. So if there was no WW1, and ultimately, no reason for Hitler to strive for power and vengeance at the rest of the world, I am of the mind that Hitler would have gone on to become a third rate painter or perhaps a second rate architect, and lost in obscurity as a small footnote in history.

So what do you think the world would be like had those wars never happened? What would America, and the rest of Europe look like today? More advanced socially or technologically, or less? Would there be an Israel/Palestinian conflict? What are your thoughts on this “What if?” scenario?