Bankers

When the old world ended it didn't die by flood. A great quake didn't ravage the world in a cacophony of tortured earth, nor did fire devour nations until only ash remained.
When the old world died, it died for greed.
The Corporate Apocalypse. The cataclysm that came not from a bomb, but from the wallet. After the GDP of nations was dwarfed by the value of companies, instead of those giant of industry being financed with government loans they began to loan to the nations.
It was a fine tradeoff... at first. Instead of interest, the companies asked for land. Then cities. Soon it was ownership of the roads.
Before long they wanted to be compensated in rivers! In lakes! Mountains! The rights to the light from the Sun!
Then there were no more nations, at least not as they had been. There were only corporations. Giant factories that spanned the size of cities, sheik glass buildings that literally scraped the sky, dwarfing mountains.
This is what the world became as parliaments were replaced with boardrooms, and kings with CEOs. As the citizens became employees, the juggernaut of business devoured the world's natural resources, turning the land beyond them into wastes.
Now wars are fought in hostile takeovers, and knives in the dark. They are fought with both mausers and white-collar crime.
In this dieselpunk world where companies rise and fall based solely on a week's profit, the boardroom battles never end. Success makes might, and currency makes right.
There's only one balancing force in this wild west of crypto and commodity. The mysterious Bank Organization. A hyper-advanced society that keeps the secrets of the world, while sharing none of there own. Their mystery secured by the power of enigmatic Bankers.
But the world never stops moving and the fragile peace is about to be shattered. Its future dependent on a newly graduated Banker, the wits of his handler, and
the severity of their greed.
After all the Bankers will protect even the world. for the right price.