I’m looking for space opera books where the plots include parts and flashbacks to when humanity first left Earth to find other planets for colonization. I really enjoy books where humans left either as part of a joint gov’t effort or from corporations. Also prefer books without alien presence unless it’s akin to the Expanse series or the Protectorate series where they’re very much removed physically and we were able to explore more systems with their technology.

Here are examples of books I finished and really enjoyed:

• The Vanished Birds by Simon Jimenez
• The Expanse series
• The Protectorate series by Megan O’Keefe

Thanks in advance!