The demons and their fallen angelic fathers wishing to eclipse the reign of King Solomon usurped his control over these lands of Undersea. Solomon wishing to please his crying and pleading brides ordered the portals to the surface to be destroyed, but it was already too late.
An unholy wave of offspring arose within the underlands and their monstrous appetites were such that they sought to devour all. The kingdoms fell as people fled to farther and farther outlying islands until all memory of the glory of former realms that had once existed seemed to vanish from memory.
In the absence of humans to devour the monsters of fallen angelic creation warred among themselves until they ripped each other apart until only a few of them yet remained to plague the remnants of mankind. Slowly order was restored by the intervention of angels who had not fallen and slowly a few scattered survivors returned from the outlying seas they had taken refuge upon.
The former island kingdoms and all the advancements of the past were forsaken though for the people had no desire to be destroyed by the conquering appetites of yet one more invader to these lands. Instead they sought to live peaceably and to this day they had in large part done so.
There were exceptions to this however. The Sea People were descendants of both the native peoples and those of slaves brought by King Solomon by which he sought to extend the diversity of the island people's genetic appearances into even more exotic appearances by which to provide himself and his courtiers even more in terms of women of exotic quality with which to fill his courts with. Such were the actions of a king who forsook honor in order to play the part of a fool.
The former slaves of Solomon, in fear should Solomon ever return to Undersea, took to living underwater, but unlike the Islanders on the surface they retained control over the advancements that had been common to them in their former days before King Solomon's loss of control over the dark spirits that he had employed as warriors for his pursuit of everlasting glory. Now this underworld of islands and expansive seas was a hodgepodge of varying people groups and once more it lay under the threat of invasion, only this time there was no combined front to withstand the aggression as Tolak's people were more interested with being left alone then taking a side in any conflict.
Above all Tolak's people clung to the simple life that they had enjoyed for centuries. Their reasoning did not go far enough as to show them that to the invaders they were little more than innocent resources to be used and exploited by those with broader ambitions. Some like Tolak understood this, but few others did.