The Xavier Institute was formed over ten years ago by a man named Charles Xavier. He wanted the young mutants in the world to have a safe haven from the mutant hostility that was sure to come. Unfortunately this was something that his students would have to face without him; only five years after the forming of the school Xavier left and joined his beloved Lilandra in the Shi'ar Empire. He left three of his students in charge of his school; Scott Summers, Ororo Munroe and the surprise decision was Wolverine. It was at Xavier's request that Logan stayed behind, even after the man had left for space. An old friend of Xavier's, Moira MacTaggert joined the school, and the healing began for the students of the Xavier Institute.
With their leader gone the students had moved on with their lives; the school flourished. More mutants joined the ranks, and the halls were filled with the sounds of laughter and joy once again. There were even some of their old enemies that switched sides, and joined them at the school. Even with Xavier gone the children were being found by the thousands, thanks to Jean Grey. She was still at the school searching for them with the help of Cerebro, following in Xavier's footsteps. As of now the school is overflowing with students, and Logan has came up with the idea to expand the school. While the new buildings are being built, the students have to share rooms.
As for now Humanity is at peace with the existence of mutants, but who knows how long this unsteady peace will last. Magneto has not been seen since the departure of Charles Xavier, so no one knows what he is up to. And as for Mystique and her unruly band of mutants no one knows the location of the majority of that team. Will they resurface? Or will it be humanity who throws the first stone, and draws them out?