Kage Baker

So vast is the shadow cast by the MGM production of 'The Wizard of Oz,' so indelible are its characterizations, so perfect its music, and so assured is its cinematic immortality, that most people think of it as 'The Original.' In fact, it isn't.

The popular mythology of creative genius depends on beloved stereotypes of the artist in youth and old age: the misunderstood upstart who forces us to see the world afresh; and the revered sage who shows us depths of insight attainable only through a lifetime of hard-won experience.

The historical novelist has to consider what has actually happened, while the SF writer is dealing in possibilities, but they are both in the business of imagining a world unlike our own and yet connected to it.