The people of Osmana
The people of Osmana have a vast, unspoken culture. Each class of people are separated by where they live.
The Sanctuaries
The people of the sanctuaries have accomplished technology beyond imagination. Nano-tech has become a part of every day life to replicate magic, while they denouncing and attempting to eradicate the actual schools of magic in the world.
The Surface
The people of the surface make due with what they are given. They farm from the land, hunt local wild life, and scavenge from the junk of the Sanctuaries. Despite not having a technologically gifted way of life, large cities have sprouted up around the globe. Magic is not actively practiced, but still exists in secret, and is generally hidden away from public view.
The Underworld
The people of the Underworld function almost entirely off of money, magic, and mischief. Need a job done? Find the nearest tavern and ask the bartender for the nearest Reigner. They'll get mercenaries on the job faster than you can pay. The Underworld exists underground and out of sight from both the Surface and Sanctuaries. Few from any other society knows about the Underworld.