"Eric: We had to introduce them, which is hard to imagine now. We had to introduce what a mutant is to an audience between the ages of 4- and 40-year-olds. Why are the people together? What's their problem? Why X-Men? What are they fighting for? Why aren't these other mutants with them? Why are some mutants against them? That's why we chose to focus them on fighting intolerant people and having more human problems than the books, which were much more fighting against super-villain of the week. We were learning it too. We’d highlight what it meant to be a mutant and why they'd chosen to be X-Men and through doing that we kept putting them up against more bad people than bad mutants."