The scorpion shrugged, and did a little jig on the drownings frog's back.

"I could not help myself. It is my nature."

Then they both sank into the muddy waters of the swiftly flowing river.

Number go up

Neuron activation

It's called capitalism. Whether that is sane, or individual self-interest without empathy is a trait of sociopaths, i'll leave up to psychologists and historians to debate.

Same thing that is sane about a paperclip optimiser making paperclips, or a mammal improving its sexual attractiveness