Fiction:Cosmos of Nahiarus/Nahiarus

Nahiarus is a realm situated within the Cosmos and is the home realm of mortalkind. Nahiarus is a domain of innumerable kinds of life, including humanoids, beastfolk and ancient elemental beings. Nahiarus is a nexus of magic and bears strong arcane significance to the greater universe. Unlike the other realms of Cosmos, the comparatively fleeting lives of its denizens have allowed for a massively diverse and rich history, much of which has been lost to time.

Prehistory
There is no numerical estimate as to how old the realm of Nahiarus is; though written history has lasted approximately ten millennia, prehistorical archaeology of Nahiarus dates back to time immemorial. Though there are several conflicting creation myths, a prevailing theme of Nahiarus' creation is amid a conflict between the so-called Primordial Ones that resulted in the inception of the mortal realm, often thought to be built from the reincarnated souls of the Primordial Ones who fell in the conflict. It is largely agreed by historians and archaeologists alike that Nahiarus' prehistory was lost to cataclysmic wars involving the first earthly deities against the Dragons, wiping civilisations off the earth without a trace.

Some cultures that are historically recorded are believed to descend from prehistory, including Oraya and Khu which still remain in the present day. Many believe that in this time, Nahiarus was open to the other realms until it was closed off from the rest of the universe for unknown reasons.

Early History (~10,000 - ~5,000 years ago)
The cradle of civilisation upon Nahiarus is not widely agreed, although the First Kingdom is often named so with early archaeological traces dating back to approximately ten thousand years ago in the deserts of Aurelia. As a result, the first known race to have established civilisation on Nahiarus are usually named as the Aurelians. In a similar time frame, the first cultures of humanity, elvenkind and dwarvenkind arose. A majority of historical accounts of the time suggest the Aurelians subjugated the entire continent of Aurelia under their rule, which forced diasporas of other kinds to other continents, notably Natelar. The actual nature of Aurelian rule remains subject to discussion; some believe that the accounts from the early races were exaggerated in places.

Aurelian accounts obfuscate most of the early history of Nahiarus - the immensely long lifespan of the Aurelians has made it immensely difficult to perfectly reconcile early civilisation accounts with Aurelian accounts, which in turn has led to several suggestions in which time the Aurelian civilisation dissolved. Most expert suggestions tend to estimate between 6,000 - 5,000 years ago. In the time of which the Aurelians flourished, nearly two hundred known civilisations rose and fell, with the dwarven civilisation of Khu being the only remotely reliable source of accounts.

Another expansive elvish kingdom, the Natelevarians, flourished in the west simultaneously to the Aurelians. Accounts regarding their interactions are minimal, but suggest there were conflicts between the two. The earliest archaeological estimations in modern day Taelen suggest their oldest cities are also nearly ten millennia old.

Middle History (~5,000 - ~1,000 years ago)
The dissolution of the Aurelians appeared to have been rapid, and in turn the reactions and power vacuums in turn were almost immediate. Three central powers established themselves - Sarepeth, Aurseleth and Gemmaushia. Whilst these three nations formed without considerable conflict, the central lands of the Aurelian continent consisting mostly of human and orcish tribes warred with one another.

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Late History (~1,000 years ago to now)
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