Most Kabbalists were theorists who were interested only in pure meditation. But there were so-called 'practical Kabbalists' who tried to apply the power of the Kabbalah in everyday life.

A few dud universes can really clutter up your basement.

They wanted to carry her, but she jumped to the stones of the plaza and strode away from the building, toward her ranks, which parted to make way for her. The streets of Pudong were filled with hungry and terrified refugees, and through them, in simple peasant clothes streaked with the blood of herself and of others, broken shackles dangling from her wrists, followed by her generals and ministers, walked the barbarian Princess with her book and her sword.

But I'm not a small-literary-novel kind of guy, and once I'd developed the world in the first couple of hundred pages, I felt that there was potential here to go on and write an engaging story set in that world. So that's what I did. This probably ruins things both for the people who want small literary novels and for those who want action-packed epics, but anyway, it's what I wrote.

Our opponent is an alien starship packed with atomic bombs," I said. "We have a protractor.

Even the best of us have certain psychological mechanisms that can suddenly kick in and turn us into monsters. That to me is the basic message of events like the rise of Nazism, the Salem witch trials, and so on: not that bad people do bad things, but that good people do bad things. It's distressingly easy for those mechanisms to be triggered, either consciously by demagogues, or naively by people who think they're trying to do the right thing. Which is why I think it's more akin to tic-tac-toe.

The science fiction approach doesn't mean it's always about the future; it's an awareness that this is different.