Rough sketch of furry/cyborg lore, to make a setting with a lot of potential for different kinds of stories, depending on which time period.

Discovery era -4000t to -400t
Humans have created an egalitarian society on Earth prime. Earth Prime is divided into regions for easy administration. A World government is established to coordinate these regions. The Arcadia incident leads to the creation of brainines, while Taurics were created as cheap labour, but rebelled and left earth prime to form their own society.

Serlnik era -400t to 200t
Earth prime becomes increasingly dominated by the sil-gol bloc and cybernetic manufacturers, due to genetic engineering declining as a result of the Arcadia incident and Tauric exodus. Cretacians filled the role the anthroids held on cretacian influenced colonies.

Oligarchic era 200t to 400t
Earth prime is fully dominated by a few megacorps and empires. Much of the population of Earth prime is dependent on cybernetics. Those who are too poor to afford them are converted into brain jars or robocops. Minorities of kobolds and anthroids migrate to the planet in the later half of the era to escape the Serlnik invasions. Finally, a war with cyborgs, kobolds and the other free anthroids of the galaxy leads to the overthrow of the earth prime planetary order.

Isolationist era 400t to 700t
Earth prime loses its colonies and breaks up into a loose confederation of states. The remaining states choose an isolationist policy, shunning interstellar space travel. Cybernetics become rare on the planet itself as the states of the planet attempt to destroy any evidence of other civilizations. A few cyborg enclaves remain on the planet, made up of escaped cyborgs, and brain jars which survived the destruction of the brain farms. Occasionally, some citizens of earth prime learn about the cyborgs and choose to join them.

Rebirth era 700t onwards
Cyborgs gradually return into the larger society of earth prime and become accepted. Anthroids become a fully modular species thanks to genetic engineering. The isolationist groups lose their power and the old history of the planet is rediscovered. Earth prime is connected to an interstellar network of faster than light travel, and become a new hub for travel, leading to a new golden age.