New Machines (All Tomorrows)

The New Machines were a robotic posthuman species that was created from the Gravital by the Asteromorphs.

When the Asteromorphs won the war against the Gravital, they repopulated the milky way with Subjects and Terrestrials, While they planned to destroy the Gravital at first, they they ultimately decided against it because they saw the value in the Gravital’s ability to survive in otherwise inhospitable environments.

The Asteromorphs remade the Gravital into the New Machines by removing their ability of gravital manipulation, giving them shorter lifespans, and slightly numbing their imagination to prevent another uprising like that of the original Gravital. However, they gave them nanotechnological bodies that were able to constantly remake themselves as they wished or needed for their jobs.

Even though they were widespread in the new empire, the machines were always rare and treated as second class citizens by the biological citizens, as past events gave them a deep distrust of their mechanical relatives.

By the time of the All Tomorrows afterword, all of humanity has disappeared for unknown reasons. Maybe it went extinct through a war, or the empire slowly fell apart, leaving individual colonies to face their own fates. Maybe, it was a mass migration to another plane of existence. The Author of the book doesn't know.

Source: WikiFandom