Hedonism will lead us to slavery.
Slaves were not allowed to have families, family is power. A person with a big family will probably have all he needs within it, no need for external government or protection.
So slaves in the past were put in giant orgies to reproduce once a year, nobody knew who was the father - > no family = full control.
There is no such thing as "end of the family" . There is the end of YOUR FAMILY, the big FAMILIES, who control the world, will always exist and keep very conservative values between them. The others will be their slaves.
Fiat colors

Man returns happy from the doctor: I got a prescription for daily sex!
Wife : what!? let me see!.... It's says prescription for dyslexia!