This government, dominated by the Centauri race native to the planet Centauri Prime, is governed by an Emperor with the aid of a Royal Court of ministers and a Centaurum appointed by the various Centauri noble houses. Below the nobility is the commoner and slave classes of Centauri and a smaller number of alien races who are mainly slaves. The Centauri Republic many centuries ago dominated many planets of the League of Non-Aligned Worlds and the Narn on their homeworld of Narn, but they were forced out by rebellions and infighting among Centauri noble houses. The Centauri mainly worship the Great Maker and the official pantheon of 50 deities, but human missionaries from the Universal Church have made some converts among the Centauri to the Pancreator. Major planets of the Republic include Ardun, Batain, Centauri Beta II, Centauri Beta III, Bentat, Beta I, Contour, Entat (home to the Entouro race), Gorash, Heptharg, Immolan, Jux Prime, Marigol, Mpias, Morbis, Nakaleen, Quadrant 1/II, quadrant 8/II, Quadrant 17/I, Quadrant 32/III, Quadrant 37/II, Raghesh III, Tolonius, Tumbar, and Ventari.
NARN REGIME
This interstellar government is dominated by the race of Narn, who hail from the planet known simply as the Narn Homeworld or more rarely as Nar'shal. The Regime is dominated by a government called the Kha'rei, which includes nine circles of power or authority. The highest leaders are the First Circle, a council of eight Narn. For a brief time in the 23rd Century A.D. after freeing themselves and their homeworld from Centauri control a second time, the Narn Regime debated whether to adopt a new political system, but reaffirmed the system of government by the Kha'rei and nine circles of power as had been established in the six decades between the first winning of independence from the Centauri Republic and the short-lived Centauri reconquest. The Narn control a number of worlds that once belonged to the Centauri Republic, including populations of non-Centauri and non-Narn aliens. The Narn vary in their treatment of alien races under the authority of the Narn Regime, including the Sorians, T'lori, Latach of the planets Sorith, T'll, and Tachunq, respectively, but they are almost invariable hostile to the Centauri for what they did to their planet and people many centuries ago. Narn religion is mostly based on the teachings of the prophets G'Quon, G'Lon, and G'Kar; but human missionaries from the Universal Church of the Celestial Sun have made some Narn converts to the Pancreator and the teachings of the Omega Gospels and Zebulon the Prophet. Other major planets of Regime space include, Dross, Hilak, Kotak, Quadrant 7/V, Quadrant 14/III, Quadrant 24/IV, Shu, and Sigma 957.
MINBARI FEDERATION
This is among the most technically advanced of the races of known space. They are often isolationist, and on rare occasions will fanatically go to war with aliens if they believe a great crime was committed. The do allow certain diplomats, traders, and other aliens into Federation space, though. They include three castes: religious, warrior, and worker. They are governed by their caste leaders and by the clans the castes are divided into most of the time, but supreme leadership is in the hands of the One Leader, always from the religious caste, and the nine-member Grey Council divided equally among the castes. There are a number of alien races within the Minbari Federation. In the 23rd Century, the Minbari experimented with rule without the One Leader and with the worker caste having a five-to-four Grey Council majority, but by the 27th Century they reaffirmed the older system of government. Minbari religion is largely based upon the teachings of Valen, a Minbari leader who lived two millennia ago, but many religious caste members have combined Valen's faith with teachings about the Pancreator, influenced by human missionaries, though very few Minbari (mainly worker caste members) have converted to the Universal Church wholesale. Important Federation planets include the Minbari homeworld of Minbar, Davala Than, drala Toth, Eshar, Nocalo, Pagatic, Ralafa, Shengol, Solta Gan, tala, Tarellen, Tavalan, Thessin (mainly due to it's moon rather than the planet itself), Trigati, Tro'kact, and Valusha. The Minbari also have protectorate worlds where they govern alien races: Klath, Morglath, o'Norsa, Tycholans.
HOW HUMANS VIEW ALIENS
The more progressive elements of the Universal Church of the Celestial Sun (Mahayana, Eskatonics, many members of Sanctuary Aeon, and moderate Orthodox and Hesychasts) sees alien races as people who must convert to the Pancreator, and they has sent missionaries with this intent in mind. The most conservative Church members (many Orthodox and Hesychasts, most members of Temple Avesti, and some Brother Battle warrior monks) see non-human races as godless heathens and enemies of the Pancreator.
The nobles of House Hawkwood get along best with the Centauri, though some Hawkwoods find the Narn as honorable beings as well.
House Decados tries to play off the Centauri and Narn Regime against each other, and try the same with the assorted races of the League of Non-Aligned Worlds.
The Hazat regard most aliens as potential enemies, but sometimes see the Narn and Drazi as honorable aliens, and will collaborate with Centauri nobles at times, perhaps seeing them as kindred spirits.
House Lihalan will view almost all alien races as godless heathens.
House al-Malik, of all the human nobility, are the most open-minded regarding alien races.
The Merchant League generally sees the alien races as a potential source of trade. They especially view the hypercapitalist Brakiri as fellow profit-makers.
The Minbari somewhat restrict contact with outside races, so humans remain largely curious about the Federation.
THE INTERSTELLAR ALLIANCE/SECOND REPUBLIC
This interstellar government was officially dissolved after Earth/Holy Terra and humans left the Alliance in the 28th Century in a civil war. The Interstellar Alliance in the 29th Century finally was officially and permanently disbanded when the Narn regime withdrew and the League of Non-Aligned Worlds likewise dissolved itself, too.
THE LEAGUE OF NON-ALIGNED WORLDS: this multi-racial, interstellar political organization no longer exists, and it's former member races and governments have gone their separate ways.
THE ANLA'SHOK/RANGERS
this paramilitary organization split into two separate, independent factions after the withdrawal of the Earth Alliance/First Republic from the larger Interstellar Alliance/Second Republic. One faction remained under Minbari control while the other faction allied itself with House Hawkwood. The Hawkwood-aligned Rangers were renamed the Questing Knights.
PSI CORPS: the official government agency of the Earth Alliance/First Republic for controlling people with psychic powers of the mind has since fragmented into separate organizations: the Penitents jointly controlled by the Universal Church and Houses Hawkwood and Lihalan, the Jackovian Agency operated by House Decados, the Dervishes under Hazat command, the al-Malik-controlled Mutasih, the Kilroys jointly controlled by the Charioteers, Muster, Scravers, and Reeves guilds; and the Harbingers controlled by the Supreme Order of Engineers.
VORLON AND SHADOW SPACE: These races, along with the rest of the First Ones, left the Milky way galaxy long ago. The Shadow's home planet of Z'hadum was destroyed soon after, and automated defenses for centuries have prevented humans and other non-Vorlons from visiting the Vorlon's former homeworld. Other ex-Vorlon and ex-Shadow planets are more accessable, and the races on these worlds who served the Shadows as junior partners or Vorlons as servants have been targeted by humans, especially Merchant League guildmembers looking for trade and Universal Church missionaries looking for religious converts to the Pancreator. The human Royal Houses that are most influential in these portions of the known galaxy are Houses Hawkwood and Decados.
THE DRAKH PLAGUE: In the 23rd Century, five years after the Vorlons and the Shadows left the Milky way galaxy, the Shadow servants known as the Drakh released a deadly plague the came close to wiping out humans on Earth, but a cure was found in time. Over the centuries, a mutated, less virulent, less life-threatening version of the Drakh plague has occasionally caused epidemics in human and alien populations, but it is einevitably cured.