Time travel and killing Hitler

Time travelers: please don’t kill Hitler. One of the most popular mind experiments for exmining theories of knowledge and theories of reality is time travel. And for time travelers, one of the most common scenarios (perhaps the most common) is killing Hitler. But … “in almost any science-fiction scenario involving time-travel, the default action is to kill Hitler. As terrible a human being as he was, there are many reasons why this probably isn’t a good idea.”