Up until modern times, Stonewielder society has remained distinctly separate from human societies. However, while this may be the case, many of humanity's less admirable traits are just as present in the Stonewielder world as our own. In the case of the Eniacs and the Edils, racism and extreme segregation take a prominent role in the unfolding of the reclusive culture.
Unlike humans, Stonewielders care very little about skin color (after all, their skin can't even be seen most of the time). That said, they still very much discriminate among themselves. During the First Kaist War (a battle between the Kaists and the Chamahez, rival factions of Stonewielders), despite an initial advantage, the Kaists found themselves slowly losing to the steady pressure of the Chamahez. Desperate for victory, the Kaists captured entire cities of ordinary humans, thousands of slaves, and used green magic to transform them into Eniacs. While they continue to physically appear human, the Eniacs were given the ability to absorb and redirect energy from all forms of Stonewielder attacks. This made them invulnerable on the battlefield, as they were able to nullify entire legions of Chamahez troops.
Finding themselves suddenly losing, the Chamahez did the only thing they could think of, and promptly captured thousands of their own slaves from the human race. These were also twisted by green magic, transformed into the Edils. Once again, the Edils outwardly appear human, but gained the ability to shunt any and all energy around them into another dimension. This effectively allowed them to freeze massive areas at a time, a form of attack that not even the Eniacs could prevent. At this point, it should be noted that the First Kaist War caused so much collateral damage that it became known as the "Black Death" among normal humanity.
Following the war and subsequent Chamahez victory, the victors were left with an unusual problem. What should they do with the living weapons that had been forged for their war? Simply killing them all seemed inhuman, but allowing such powerful beings back into human society (or even allowing them to live among the people responsible for their conditions) didn't seem advisable either. As such, massive environments were built for both species. The Eniacs were shoved onto an island in the middle of the Gulf of Mexico, while the Edils were shipped down to Antarctica and basically just left to their business. Over time, the care of these beings changed, with the Edils eventually becoming locked behind powerful force fields, and the Eniacs inhabiting and carving out a large cave under the island.
Despite this event occurring hundreds of years ago, discrimination is still a prominent factor. The Edils haven't been allowed out of their imprisonment in countless years, in fact, simply being outside the enormous cage is enough to warrant a death sentence. Any Stonewielder that kills an Edil, regardless of whether or not it was in self-defense, will be acquitted.
The Eniacs, on the other hand, have a handful of freedoms. An academy was built on the island (eventually named Gumarcaj) to allow any Stonewielder Eniacs to attend a proper institution. Additionally, as long as a sponsor travels with them, some Eniacs are granted passes to explore the larger Stonewielder world. However, once out, if any Stonewielders believe them to be threatening, murder is once again allowed. Many Eniacs continue to push for justice, but any hope of that happening will be a long time coming.