There were people in this world whom were born different, given extra abilities that they made them something more than everyone else. The world didn't think of them as special, as something that was positive for evolution. They were deplorable and dangerous. There was a prejudice against them that meant they were less than the 'normal' people. Once you've been put away and labeled as some 'thing' that needs to be avoided it was too difficult to survive in this world. What could they do other