[Astromancer]

Try this, a narcissistic billionaire, who made his money in biotech, has created a Proteus virus. Basically, this way overconfident genius thinks he has created a tool to add the equivalent of fifty IQ points (GURPS-speak +5 IQ) to everyone. In 2030 he releases the virus into a dozen busy airports worldwide.

Forty percent of the population died within six months. Of the remaining, six out of ten, five went insane. Most of these victims are like most mental patients harmless and more likely to be harmed than hurt. There is a small, less than one percent, pool of dangerous crazies. Given the social chaos, it's hard to keep these people under proper control.

Note: Children born in the two decades since the plague average a GURPS IQ of 15. However, about ten percent of all children show strong sociopathic tendencies.

Can society hold together?