In ”The Coming Race” by Lord Lytton, we are introduced to a subterranean terrestrial race known as the ”Ana”.
They are described as comparatively calm and at peace with their lot in life; there are no social institution or dogma that is troubling for any group of peoples in their society, there is no inter-cultural unrest (or, arguably, even an ”inter”-culture, as much as one single global culture). They are free to pursue any profession, they have some form of gender equality, but yet still maintain cultural differences between the genders – as if Lord Lytton is trying to sneak in his female ideal, rather than an egalitarian community.
Their physical make-up is described as equally serene – not entirely alien, but as humanlike, yet with an alien air about them; as if their physiology has evolved to no longer need to convey social interaction (e.g. Disgust, anxiety, sorrow, etc.), but instead in a constant state of calm and collectedness.
Their sociological structure is somewhat reminiscent of H.G. Wells ruminations on a posthuman structure. We know the race has existed for at least as long – most likely longer – than humanity has, but that they do not suffer from overpopulation, inequality, or – apparently – disease. Much like Wells foreshadows a posthuman race where inequality and overpopulation is eliminated by active intervention – although it is never stated if this state came about as a result of active intervention.
Conversely, however, we see a ”Spiritual singularity” being the progenitor of this state: A force (Vril), which seemingly allows the Ana to not only commune with other life, influence weather, and activate machinery, but also a force that seems to have its own agency (i.e. Maintaining cavern temperature, wild-life, etc.)
In this last sense, the Ana seem to be in a posthuman stage, while their sociological, cultural, and technological levels are arguably only straddling the border between human and posthuman.
Image taken from “Stargate: SG-1” Season 1, Episode 8, “The Nox”, depicting the “Nox” race – a super-advanced civilization that has reached a ‘Spiritual Singularity’, allowing them great control of etheral forces in the world – here performing the “Ritual of Life” (resurrection/healing).