Thread:Valkerone/@comment-35050701-20181113210720/@comment-35050701-20181113212207

It could even be argued the Joker is not as insane as he claims to be, but is simply a psychopath.

https://guff.com/is-the-joker-actually-insane-maybe-not-according-to-science

https://www.thewrap.com/suicide-squad-jared-leto-the-joker-research-real-life-psychopaths-doctors-dc-comics-batman/

https://www.huffingtonpost.co.uk/entry/batman-villains-psychoanalyzed_n_901913

The bottom link is worth a good read.