It says a lot about the success of the X-Men that anyone can read into it whatever they want to. You can find in the X-Men the metaphor that you're seeking, because it's all about difference.
— Phil Jiminez, Superheroes: A Never-Ending Battle
"I'm a Mormon. The X-Men speak to me". "I'm black". "I'm Asian". "I'm an immigrant". "I'm gay. They speak to me".
— Chris Claremont, Superheroes: A Never-Ending Battle
What he (Tolkien) means by allegory, of course, is that you could have a one-to-one substitution, so the ring equals, I don't know, nuclear energy. That kind of simple-minded interpretation is exactly what he was trying to avoid, and it's part of his genius that he didn't write an allegorical book. That's why new generations of readers can keep on finding meanings from their own lives, because of what he called applicability: To enable you to fill in the precise meanings of the various things you're reading about from your own experience.
— Dr. Patrick Curry, "J. R. R. Tolkien: Creator of Middle Earth" (The Fellowship of the Ring DVD Extra)