The Lewis Nations

The Lewis Nations are a set of predominantly Human nations originating in the Lewis Galaxy, founded out of war refugees from Aylathiya. Although they started in the Lewis Galaxy, thus the name, they no longer comprise just the Lewis Galaxy, but four other galaxies (Iskadi, the Rodaun, Kevenam and Avana), where they expanded to. The area covered by this nations is known as Herschel Space, a sphere of high human population in a sea of yet human uncolonized empty territory. They concentrate a third of the total Human population in the Universe. The closest Highly Human inhabited space close to this group of nations, is the Martial Space region of Aylathiya.
Most of the Septillions of human inhabitants that currently live and form the bulk of this nation's population can trace their ancestors back to The Twelves ships of the Forefathers that departed through the Eye of Freedom, carrying 8 Billion settlers.  Five of those ships had left from Anar after the Anarian Fever Crisis, carrying up to 750 million settlers each. The other seven colony ships came from torn up worlds that joined the Anarian initiative of "the Great Scattering" , the Abeona Iniciative, to run away from the galaxy.  However, some quintillions of Humans currently in the Lewis Nations have their ancestors linked to other later waves of migrants.
This Nations have formed a Council, known as The Lewis Council, to talk about the internal affairs of Humans inside the Herschel Space. All of this nations also have a seat in the Intergalactic Council and are members of the Herschel Space Council, a council that also includes Alien Species and Alien Nations, such as those of the Aldorians and the Kriziks, among others.
The Lewis Nations and Herschel Space by extension, have one of the largest human populations and densities in the known Universe. About more than a third of the Human species (1 in 3 humans) resides within the limits of the Lewis Nations. The total population of the Lewis Nations combine is 356 Sixtilion people  
Out of the 356 Sixtilion, around 276 Sixtilion are Humans while 80 Sixtilion are xeno species within the Lewis Nations (Almost exclusively inside the Intergalactic Federation (with 35 Sixtilion xeno, half of its population) and the United Alliance (44 Sixtilion, two thirds of it's population). 1 Sixtilion Xeno live scattered as merchants, mercenaries etc within the other Lewisian netions.)  
PD: The Xeno population within the Union and the Empire of Mankind is around 27 Sixtilion but those xeno have no citizenship and are not counted as inhabitants. Most live in secluded forced reserves. 15 in the Empire and 12 in the Union.  
The Nations known as the Lewis Nations are six:
*The Empire of Mankind: The biggest and oldest of all the Lewis Nations
*The Intergalactic Federation, previously known as The Lewis Federation
*The Union: A Theocracy dictated by the Unionist religion and its parasite, "the Gift".
*The United Alliance: A democratic multispecies nation.
*The Plutocracy of Gish: The second oldest nation, is currently a Megacorporation.
*The Republic of Sion: A highly technological advance nation.
NATIONS 	CAPITAL	MAIN SPECIES	GOVERNMENT 	POPULATION
    	Empire of Mankind 	Elpida (Executive)
Pax (Legislative)
Mitra (Judiciary)	Humans 	Nobiliaric Empire 	82 Quintilion
The Union 	Isso 	Humans 	Theocracy 	78 Quintilion
Intergalactic Federation	Elysium	Humans/Humanoids
Malakians
Others	Democratic Federation 	70 Quintilion
    	United Alliance 	Kreon 	Humans (founders)
Many Species	Federal Democratic Alliance 	66 Quintilion
    	Republic of Sion 	Sion 	Cyborg Humans
Robotic Life
Others	Technocratic Republic (direct democracy)	34 Quintilion
  	Plutocracy of Gish 	Gish 	Humans 	Nobiliarian Oligarchy/Megacorporation 	26 Quintilion