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.

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

Interesting things happen along borders - transitions - not in the middle where everything is the same.

To condense fact from the vapor of nuance.

Humans needed water or they would die, but dirty water killed as surely as thirst. You had to boil it before you drank it. This culture around tea was a way of tiptoeing along the knife edge between those two ways of dying.

In the room where I work, I have a chalkboard, and as I'm going along, I write the made-up words on it. A few feet from that chalkboard is a copy of the full 20-volume Oxford English Dictionary, to which I refer frequently as a source of ideas and word roots.

Whenever serious and competent people need to get things done in the real world, all considerations of tradition and protocol fly out the window.