Professor X's dream has long been at the center of the X-Men's mythos. Charles Xavier's dream of peaceful coexistence between mutants and humans motivated him everything he did in life and changed the lives of just about everyone it touched. For years, the X-Men fought for the dream, and it became something mythical, a perfect ideal that the X-Men and Xavier himself would never stop believing in it or fighting for.
Source：https://www.cbr.com/xmen-professor-x-flawed-dream/
