Religion is a tricky thing. I am NOT trying to express my opinions of any religion or advocate or reject any belief system in our reality. I probably will inadvertently, but that's the nature of the beast. That being said, religions, in a broad brushstroke:251Please respect copyright.PENANA1DbnbpuFkQ
Religion was on its way out before the cataclysm happened. No miracles were found, science abound with new discoveries happening daily. Some religions held on. Some were willfully ignorant, claiming science was a sham, another belief system no more valid than their own beliefs. These voices were few. Others believed that science itself was created by their chosen god, a tool for their creation (us) to use, just as valid as a hammer. This was the majority.
(Side note: I am purposely staying vague on when the cataclysm happened. The closest you'll get is "In modern times")
Then the Cataclysm happened. Miracles became possible, and the cataclysm itself could be viewed as the end of days prophesized in many religions.
The introduction of magic validated many views and made religions nearly extinct become common again. Converts were an hourly occurance, especially as society started to break down and people became desperate for anything that might save them.
Not only did the major religions see a sudden major growth, but many of the pagan religions suddenly seemed valid again, though their belief systems for how magic was supposed to work were quickly proven false. The fluid nature of their belief systems allowed for adaptation and acceptance.
Magic was not seen as the beneficial hand of god by everyone. Some saw it as the corrupting hand of Satan. These religious followers started witch-hunts. This was a more valid action during the early days after the apocalypse when magic users were few. As understanding of how magic worked the number of mages increased, then general magic use. It became harder and harder, then impossible, to stop the spread of magic.
At the time of 'School of War' religions are still common place. Some religions still shun magic as evil, but no longer actively try stopping outsiders from using it (mostly). Most religions consider magic gods work and accept and work with it as part of his divine power. About forty percent of the population are atheists. About ten percent are spiritualists (Equivalent of agnostics in our world with a mystical twist). thirty-five percent are made up of a mix of modern major religions. The remaining fifteen percent are either minor pagan religions of our era or new religions unique to this world.251Please respect copyright.PENANANWXNvJOdfq