Terran Authority Setting
The Terran Authority is the outgrowth of the multinational 'peace-keeping' organisations of the 20th Century.
After the general chaos of the Third Stellar War the surviving nation states on Earth banded together to create the Terran Authority. While originally the Authority was intended as a forum for nations to air their grievances as the 22nd Century progressed the Authority started to take more control away from the various nation states and colonies within the solar system becoming effectively a unified nation under the auspices of the Terran Authority.
By the beginning of the 23rd Century