I choose the second.
I find it risky to change history. How would the world have changed in the last, almost 100 years, if Hitler had never had any influence? No one can say that.
It's a little different when history is going on. We don't know how history would turn out if Donald Trump lived on. But we don't know what history would be like if Donald Trump would die either. But exactly that is history, changing things.
Well, how I would change history is another question. The fact is, I don't want to change history as it happened until now. That's why I'm taking the second.
(By the way, Hitler almost drowned in a river in his childhood, but he was saved.)
would you rather fly a jet plane or a propeller plane?