@linuxgal In the novel they actually were on a different planet.
"The 60s and 70s saw a huge prevalence of irrationalism too."
Don't for get the '50s.
And the '80s.
And the '90s.
And the '00s.
Oh, wait, those are all the decades he mentioned.
@thomasfuchs You know what else 1950–2010 had in abundance? Serial killers:
https://serialkillersinfo.com/serial-killer-statistics/serial-killers-by-decade/