Batman has become the most popular character in comics and there have been some monumental milestones in his long history.

Batman is often seen as the ultimate symbol of restraint in superhero history, defined by his strict no-kill rule. But what if that rule was born from one of the darkest moments in comic book history?

From the moment Robin appeared in Detective Comics #38 in 1940, Batman’s world felt different. Gotham was still dangerous, ...