The Joker has had his own comics and practically dominates Batman's comics, which has led to DC having a serious Joker issue - in that he's used far too much. But thankfully, there's a simple solution ...

The Absolute Joker of Absolute Batman is something else entirely... and may need quite the explanation (Big Honking ...

Even the average citizen of Gotham can be driven mad if they suffer enough tragedy. James Gordon and Batman both thought that they proved the Joker wrong about how close everyone is to insanity ...

It was at this time that Joker truly turned mad. O'Neil and the writers who came after him began focusing on Joker's insanity, and with it came the creation of the landmark Arkham Asylum.