Got some more questions! Jamie asks:
It strikes me as odd that at the technological level the Eldrae work at that they appear to be working under an ideal capitalist system in an era of post scarcity technology. How is wealth determined? What is the currency based on? What kinda of inequality is there if any?
Well, the thing to bear in mind about “post-scarcity” societies is that virtually all of them are actually only “post-material-scarcity” (or “nearly-post-material scarcity”, which is how I’d describe the Core Economic Zone polities and regions in the Eldraeverse.) Some things tend to remain scarce – ideas (especially if we assume that inventors, designers, authors, and so forth like to be paid for their work for reasons over and above what the money can buy them, which as an author, I’m pretty sure of), personal services, availability (only so many people can attend X event), etc., etc.
This is true even if we step out of my universe and examine the ur-post-scarcity example, Iain Banks’s Culture, in which a plot driver running through many of the books is the competition to get into Contact, or Special Circumstances, which by no means takes even all the qualified people who want to get in. In Look to Windward, we also see the case of a live concert timed to match the light from a particular supernova – and thus obviously limited to only that one particular place and time and audience – cause such perceived scarcity that even the people who are very smug about “money is a symptom of poverty” immediately reinvent scarcity economics and trading favors in the quest for tickets.
So that’s why they still need an economic system. (Well, that, and nearly-post-material-scarcity only means that mining, generating, and manufacturing is super-cheap, not free, because it still takes energy and thought to do – thermodynamics, it is a bugger. People may only be paying the equivalent of $20/month, easily covered by the Citizen’s Dividend, for the right to manufacture a giant pile of consumer goods every day, but that trivial cost is still there on the back-end.)
As for capitalism – well, now, I find that something of an unfortunately loaded term in *here*’s politics, so I try not to use it to describe things *there*. Their system is both propertarian – inasmuch as it esteems private property, and makes great use of property rights in various areas – and agorist – making use of free markets (which, given their views on the essential nature of consent, is close to the only ethically permitted option).
When I say “loaded”, of course, one of the things I mean is that people assume that capitalism includes only for-profit corporations (which the Empire’s system doesn’t – as the link above says, CEZ economies have an extensive agalmic component, and usually support healthy gift economies, open source communities, alternative internal economic arrangements (co-operatives, ecodemocracies, etc., etc.), the bounty economy, the street performer protocol (like Kickstarter), etc., with wage-based employment (which is almost nonexistent outside indenture – see here, here, and here). It is, if you will, also a free market in free market types.
…and it stays that way, essentially, ethical issues aside for the moment, because the Empire got to become a wealthy nearly-post-material-scarcity civilization by being organized that way, and the wise man does not kick away the ladder that got him where he is today. Especially if he’s still standing on it.
As for how the currency’s based, there’s a good explanation of that here (look down in the article; the first part covers why it’s Very Much Not Gold). It’s essentially fiat, but a peculiar kind of independent fiat designed to match the currency base accurately to the production capacity of the economy (because inflation is a form of robbing creditors to pay debtors, and deflation is a form of robbing debtors to pay creditors, and that is just not on, no sir).
As far as inequality is concerned, I can do no better than point you at the explanation here: Trope-a-Day: No Poverty.
The other thing that seems odd is that they are very planet focused and mentions of space habitats of all shapes and sizes seems rare. How common are Eldrae habitable worlds? What makes planets more useful than more energy and resource efficient habitats? How have they varied the basic habitat designs?
Um, not sure where you’re getting that from. I seem to recall more than a few mentions of one habitat or another, and canonically about three-fifths of the Imperial population are spacers, only two-fifths living on planets. (By no means all of which are habitable, if by that you mean “shirt-sleeve habitable”; most of the populated planets in the Worlds are partially-terraformed Mars-type worlds, which are actually much easier to deal with than existing garden worlds, habitability-wise.) There’s a certain bias towards garden worlds in the Thirteen Colonies, back in the Imperial Core, because of the preferences of the old subluminal colonization days, but in general, it’s not so; and the list of “habitables” tends to include worlds like Sialhain (Venus-like, colonized in aerostats), and Galine (Titan-like), and so forth.
As for why planets – why not planets? People started out being used to them. Sometimes people like seeing landscapes that someone doesn’t have the architectural plans for, or smelling a few trillion tonnes of aeon-old biomass on the wind. (Or maybe they just like wind, who knows?) Or, y’know, because planets have oceans, and while there are aquatic habitats, you’re not getting the cetacean uplifts out of the Big Puddles any time soon. It’s not a decision anyone’s making out of questions of efficiency, being nearly-post-material-scarcity, and all; it’s a decision people make because they feel like it, and why not?
As a side note: garden worlds are also extremely useful and valuable because they have ecologies, which are very information-dense. And even in the most crassly commercial sense, an ecology is a giant library-cum-research-program of new biotechnological and nanotechnological tricks to draw from. It’s just good business.
(Outside the Empire and other transsophont cultures, of course, many people live primarily on planets because they’re too Luddite or biochauvinist to modify themselves to live comfortably long-term in microgravity. But, hey, someone’s got to be the meek who inherit the Earth, right?)
Habitat-wise: well, I’m going to keep the details under my hat a bit until we see them in fic, but teaser-wise, what I will say is that while there are some O’Neill cylinders and the like, the majority of them could be classified as modular structures or asteroid beehives, operating in microgravity – and even the cylinders tend to operate under low spin gravity. After all, why live on a faux planet when there are plenty of real planets around? Spacers prefer to live spacer-style among spacer-style architecture, by and large.