In our day and age, modern Europe is the hub for Hunters of all kinds. Mages calling down fire and Slayers that have trained their skills with the blade. Dragon slayers and vampire hunters occupy castles and church halls. Werewolves are culled in the fields, and succubus are vanquished in whore houses. For the most part, these activities are carried out in secret. There are those in the world who aren't with any of the schools, but have had encounters with either the monsters, or the hunters. People call them crazy when they speak of it, others simply stay silent and do their research, preparing for their next run in with the beasts.
The primary organization for the hunters is named The Hellsing academy, founded by the first true Slayer to take up his mantle with himself as the headmaster. After a few decades of training powerful Slayers like himself, hundreds of thousands of man hours put into research, and untold legions of unholy abominations slaughtered, the great Slayer and his companions had created the first true school of magic, dubbed "The SpellSlinger".
Unlike Slayers with their gadgets and traditional weapons, the Gunslingers leveraged their mastery of the elements in the now perfected form of magic bullets, and enchanted physical rounds. They took their findings to the other schools that occupied the European monster hunting theater, with all four magic elements made available so that new schools of thought could be created in the arts. In exchange for their research on elemental mastery, the schools would reorganize under the Van Hellsing academy in a loose but cooperative coalition. With that, the Academy became the spearhead of large scale anti-monster military magic, with dozens of specialized schools under them who also maintained forces to bring against the growing horde.
With this new and highly powerful coalition of demon and monster hunters established, the number of human attacks on the forces of darkness became three times as frequent, with losses dropping to a staggeringly low number. Gunslingers, in coordination with specialists of all types, all but erradicated the blight that had been set upon humanity. With evil losing it's grasp on the planet, and new schools set up in north america, and asia, criminality took an equally substantial dive. human armed conflict dwindled to brush wars in undeveloped regions in the world, which the schools promptly set their sights on, seeking to improve the lives of all of humanity.
However, with their work, comes a price. As humanity was silently marched towards a Utopian state by the quiet guardians of human life, a storm brewed on the horizon. There were forces at work that were not at all pleased with their loss of power on earth...