When I was a kid a common trope was super-villain destroying the world, with super-hero(es) rushing to stop him (always him, I never remember any female villains trying to destroy the world). As I got older I used to wonder about what the villain was thinking with blowing up the world. I mean most didn’t have a rocket off the planet, if the world ended it would take the villain with it. I think this was my first exposure to the concept of murder-suicide, the murderer taking the victim with him. I do remember one episode where the sidekicks questioned the villain about that, but that was a not-very-smart mad scientist who hadn’t thought that far ahead.
Now murder-suicide is almost-daily as a mass shooting scenario…
And I ran out of words on this subject.
Witch on a Bicycle 