I read this novel about 20+ years ago, I remember the story quite well but I'm having trouble finding the title.
The novel is split into three threads; the first is people living in a society on an Earth-like planet where they are denied any identity e.g. names - husband and wife have to refer to one another as "he" and "she". They aren't supposed to show emotional connections to one another, those that do are horribly punished. They are at a low level of technology and live in the forest(?).
The second thread is a more technological society but on a planet where the surface is uninhabitable so are eking out a miserable existence in underground caves. There's a bit about an underground Running Man/Hunger Games style death match that's the main entertainment.
The third thread is set in our near future on Earth and this eventually reveals how the societies in the first two threads came to be. A TV evangelist
(secretly a psychopath)
type becomes a politician, then president of the USA before rigging his election to some kind of "world president". He convinces the world some kind of catastrophe is approaching and everyone needs to be evacuated from Earth into suspended animation in orbital stations.
He has a secret plan though that results in two lots of colonists making for a new planet, while everyone else in suspended animation around Earth is quietly killed. For some reason he sends one lot of colonists (possibly had some enemies or rivals aboard?) to the harsh planet. The other lot end up under his insane rule on the habitable planet. There's some kind of resolution that I think involved his daughter inciting a rebellion?