This 1972 SF novel is set in a future in which #TootCat users are among the few survivors of a global calamity created by the "Demons" -- descendants of today's Republicans.
(I first read this as a tiny sometime in the mid-70s, borrowed from the Durham County Library downtown (when it was in this building iirc), only acquiring a copy for myself relatively recently -- which is to say sometime after 1985 or so. [straightface])
Anyway, I'm reading it to @Harena as a bedtime story.