My oldest niece is downright passionate about superheroes and the meaningful role they play in our society. (I’m not alluding to their decision to stalk the corrupt in dazzling, neck-to-ankle spandex—but I do count ANY inkling of body positivity as a win.)  “Superheroes,” Celeste coolly spouted on a recent, late-night call, “exist to call us to a greater purpose, to remind us of our inner strength and the necessity to stand up for those that are unheard, underrepresented, or oppressed—even when it might make us...