Take, for example, there is a right-wing populist uprising. It's very common, even on the left, to just ridicule them, but that's not the right reaction. If you look at those people and listen to them on talk radio, these are people with real grievances.

Small changes can magnifiy. The possibility of interpersonal communication has increased substantially with contemporary technology. But as compared with the major changes, which were long ago, these are not huge.

Groupings of people that get together, think things through, come out to plan and so on, like unions or true political organizations, they've disintegrated. And people tend to be atomized - you get down to a society based on social units based on an atom - an atomic element - which is a person and their computer. Not a society that is going to be able to function freely and democratically. The tendency is there; it doesn't have to be, but its something to worry about.

Everybody's worried about stopping terrorism. Well, there's a really easy way: stop participating in it.

In fact, it's pretty dramatic when you get to 1975, very revealing, the [Vietnam] war ends. Everybody had to write something about the war, what it meant. You also had polls of public opinion, and they're dramatically different.

If you sell me a car, we have perhaps made a good bargain for ourselves. But there are effects of this transaction on others, which we do not take into account. There is more pollution, the price of gas goes up, there is more congestion.

If a child from an Amazonian hunter-gatherer tribe comes to Boston, is raised in Boston, that child will be indistinguishable in language capacities from my children growing up here, and vice versa.