At the moment this is in spitball form and obviously will be tweaked toward something more akin to novel writing at a later date.
This is effectively a 'fallen world' style setting where at a point in the distant past Eideon was an advanced world of both technological and magical standing that was even capable of space flight. The understanding of technology allowed for a greater and more indepth control of the more supernatural elements once known as magic and referred to as 'super-science' by the more knowledgeable.
At some point in the distant past the two dominate species on the planet, the native elves and the imported masses of humanity entered into a state of warfare. This saw both sides create their own manufactured races in an attempt to gain an edge. Which finally ended over a thousand years ago in one massive world ending use of magical and technological weapons of mass destruction. This effectively laid their world low and set their civilization back by nearly a thousand years. As of the current date they are still recovering with barely an understanding of the progress and technology of before.