Earth is the third innermost planet in the Solar System and the origin of mankind, and did not require terra-forming. Eventually, it was conquered by its colony sent off to the Moon. It stayed under Society's rule since its establishment, becoming part of the Core. Two Earthborn families died in the conflict generated by Darrow in the events of Golden Son. Darrow describes Terran accents as "fast."
Gray siblings Holiday and Trigg ti Nakamura grew up in Goodhope, Africa. This is presumably referring to The Cape of Good Hope in Southern Africa.
Before the time of the Conquering, Earth was divided into around 20 nations that were mutually suspicious of each other. Below are some countries that existed from before.
Indian Empire Edit
One of the last countries on Earth to fall to the Iron Golds. Presumably consisted of the countries that used to exist within the Indian sub-continent.
Empire of the Rising RunEdit
Presumably, this Empire included Japan, and probably some of China, Korea and Southwest Asia.
Based somewhere on the east of the Americas with a naval fleet.
The American Empire Edit
Created after the United States of America fell, this Empire presumably also includes Mexico and Canada.