The Art of Fiction; an interview from The Paris Review:
...Q: Does literature, then, have any social obligation?
Bradbury: Not a direct one. It has to be through reflection, through indirection. Nikos Kazantzakis says, “Live forever.” That’s his social obligation. The Saviors of God celebrates life in the world. Any great work does that for you. All of Dickens says live life at the top of your energy. Edgar Rice Burroughs never would have looked upon himself as a social mover and shaker with social obligations. But as it turns out—and I love to say it because it upsets everyone terribly—Burroughs is probably the most influential writer in the entire history of the world.
Q: Why do you think that?
Bradbury: By giving romance and adventure to a whole generation of boys, Burroughs caused them to go out and decide to become special. That’s what we have to do for everyone, give the gift of life with our books. Say to a girl or boy at age ten, Hey, life is fun! Grow tall! I’ve talked to more biochemists and more astronomers and technologists in various fields, who, when they were ten years old, fell in love with John Carter and Tarzan and decided to become something romantic. Burroughs put us on the moon. All the technologists read Burroughs. I was once at Caltech with a whole bunch of scientists and they all admitted it. Two leading astronomers—one from Cornell, the other from Caltech—came out and said, Yeah, that’s why we became astronomers. We wanted to see Mars more closely.
I find this in most fields. The need for romance is constant, and again, it’s pooh-poohed by intellectuals. As a result they’re going to stunt their kids. You can’t kill a dream. Social obligation has to come from living with some sense of style, high adventure, and romance. It’s like my friend Mr. Electrico...