Trinary wrote:Centauri Republic -- It's ruled by a hereditary Emperor. That is LITERALLY the exact OPPOSITE of a republic. The definition when you type in Republic is "a state in which supreme power is held by the people and their elected representatives, and which has an elected or nominated president rather than a monarch." or "a group with a certain equality between its members." Now you can argue that the Centauri have a very Roman-esque feel to them, having many gods, loving wine and revelry and maybe the Republic/Emperor thing is a reference to how the Roman Republic became an Empire ... but I can't see high born people in the Roman Empire, noting the coronation of the 12th Emperor or whatever, commenting about how they're a "republican" (lowercase r) as Londo once did. And he's from a prominent noble family so that makes no sense either.
The Patrician families supplied much of the the leadership of the Roman Republic througout its history. Until its final fall to the Ottoman Turks in 15th century, the Roman Empire never stopped referring to itself as the Roman Republic. None of the titles Octavian gave himself at the time suggested monarchy. The root word for "Emperor", Imperator, meant "commanding general". His title of "First Citizen" evolved into English's "Prince". Those words became assocuiated with monarchy because of the later understanding of what Augustis Caesar had established truly was. The Centauri were modeled on the Byzantine phase of the Roman Empire, going into slow inexorable decline with occasional fits of resurgance. The Imperial Throne was sometimes hereditary from father to biological or adopted son but often not.
What a political entity calls itself is not necessarily indicative of what it actually is.
P.S. - Do the Vorlons call themselves anything? We never really saw any internal workings of the Vorlon government, so it is possible none of the younger races had a clue about how the Vorlon were organized. I imagine "empire" is a word someone just slapped on them and they were too aloof to care.