John Keegan

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.

You know when Hollywood does a great big blockbuster that really wraps you up in a world, and lets you believe in extraordinary things that move you in some way, in an almost operatic sensibility? That to me is the most fun I have at the movies.