The leading, the most respected Vietnam historian, military historian Bernard Fall -he was a hawk incidentally, but he cared for the Vietnamese - he said it wasn't clear to him whether Vietnam could survive as a historical and cultural entity under the most massive attack that any region that size had ever suffered. He was talking about South Vietnam, incidentally.

Very commonly substances are criminalized because they're associated with what's called the dangerous classes, you know, poor people, or working people.... Actually, the peak of marijuana use was as I said, in the seventies, but that was rich kids, so you don't throw them in jail. And then it got seriously criminalized, you know, you really throw people in jail for it, when it was poor people.

The American Revolution was a small part of a major world war going on between France and England, so the French intervened and that was a big factor, but the domestic contribution was basically guerrilla warfare.

When people say do you believe in God? what do they mean by it? Do I believe in some spiritual force in the world? In a way, yes. People have thoughts, emotions. If you want to call that a spiritual force, okay. But unless there's some clarification of what we're supposed to believe in or disbelieve in, I can't answer.

There are very interesting books about these events, for instance one by a very well-known American historian named William R. Polk called Violent Politics. It's a record of what are basically guerrilla wars from the American Revolution right up through the wars in Afghanistan and Iraq.

We can imagine a society in which no one could survive as a social being because it does not correspond to biologically determined perceptions and human social needs. For historical reasons, existing societies might have such properties, leading to various forms of pathology.

It's true that language is in a sense linear but that is as obvious as perceptual space is three-dimensional.