Is there any list of known civics around? That'd be quite a help for me in terms of empire creation.
But I do already have one in mind, the Hakari Hegemony. This might be a bit of a long one so hold with me.
Singular Hakar, plural Hakar', adjective Hakari. I'm undecided between Spiritualist and Authoritarian, or if I should throw in Xenophobe into the mix, but I'll go with Spiritual Oligarchy or Dictatorship for a start, and change it to Dictatorship authority by the time I unlock the first Psionic Ascension perk.
A lizard-like, hot-blooded species in the windswept tundra plains of their large world Han'Tsuri, with the ' representing a "click of tongue", so to say - obviously not a real one as they do not have tongues proper, but the closest approximation in human phonetics. Specifically, this sound is created by the clapping of a small flutter-like valve at the top of their mouths, which leads to olfatory/chemical analysis chamber, directly connected to their largest and most cranial nervous ganglion, responsible for advanced cranial sensory input processing (vision, smell, taste, hearing). They have two other nervous ganglions, one at the base of their necks which is responsible for coordination and movement in the upper limbs plus memory storage, emotional processing and higher brain functions (including their latent psionic capabilities, of course), and a third one at their "hips", responsible for coordination and movement in the lower limbs, endocrinal regulation and nervous control of viscerae. [1]
Their environment deeply shaped their culture. The vast distances of virtual desert with skin-shearing wind created a strongly tight-knit society in which group-think is king and tradition is law. Such traditions are created by millenia of survival in such an extremely inhospitable environment, in which any lone Hakar that strays from the group could expect to die before finding another group or shelter in the nearly insurmounable distances. Although by now inhabiting densely populated artificial cave complexes protected from the bitter climate, they still cling to such ways of life however arbitrary they might look to other races. Ritualization, shunning of outsiders and rigid hierarchy share a space with a strong communitarian spirit and a pervading willingness to sacrifice for the fellow insider.
Different from most other races with similar thought-patterns in my personal lore, their society does not have "family units" proper around which to rally. Younglings are not raised by their mothers directly, but are instead entrusted to be raised jointly by the entire group, in smaller communities, or specialized grounds dedicated to such activity, in more populated caves. Similarly, they do not form couples, much less life-long ones. All individuals are hermaphrodites, most of the time adopting a relatively gender-neutral phenotype, but in specific designated periods - once dictated by pseudomycelia harvests, now purely by tradition - a portion of the population would differentiate into male and female forms and create temporary partnerships of six to ten individuals. After all females are reasonably sure of having been fertilized [2], the males go into a third phenotype, the caretaker gender, neither remaining the true male phenotype nor reverting back to the full hermaphrodite form, and wait for the females - now in its very own specialized phenotype - to give live birth. After the more-or-less synchronized event of birth, females revert to the full hermaphrodite phenotype, and the half-males take the mantle of main communal caretakers. They become the ones that most often interact, guide and teach the younglings, although the entire community is expected to chip in very often. Generally, in a smaller cave the work is more or less split in half between the 10-to-20% of caretakers and the rest of society, but as the cave grows the caretakers get a higher and higher percentage of the work load, topping at around 75% of the childrearing workload in a large metropolis with "schools" being evenly distributed through most of it.
I have some minor lore on their psionics and the political structure in itself, but I have not detailed it enough to put it in writing here. There is also a gap in history between their decentralised network-of-cave-archipelagos-in-a-tundra-sea to a unified political structure, although not really "centralised" in a human sense. I intend on fleshing these out in the future, but my next few weeks are pretty full with med uni, up to around a week after Utopia launches.
[1] I based this one on how humans have two "enlargements" (correct name in English?) in their spinal cord, one called the cervical enlargement, with nervous nuclei (bundles of neuron cell bodies) responsible for reflexive actions in the upper limbs, and the lombosacral enlargement, analogously responsible for reflexive actions in the lower limbs. I merely transfered a few brain functions to those and left the "brain" as a sophisticated sensory processing center.
[2] I initially based the part of no-nuclear-family-units on the Race of Turtledove's Worldwar, but I went quite beyond it in the end, with a full five-gendered (!) system. Their reproduction is also quite unlike what is familar to humans. "Male" phenotype individuals have an injection-capable appendage in their lower jaw which can extend from their mouth to inject gametes into a specialized receptacle around the place in which humans would have their belly button. They pretty much get pregnant via cunnilingus. Both male and female gametes are produced between the moment in which a hermaphrodite takes a gender and when they get fertilized/devolve into the caretaker gender, so there is a bit of a wait between the moment in which they begin forming partnerships and they begin doing the do. Because it is such a direct fertilization - male gametes are pretty much spit onto the female ones - it isn't a very long one, and their "litters" are not very big, a typical one being two or three younglings with the occasional birth of four or one.