As for climate change, it's by now widely accepted by the scientific community that we have entered a new geological era, the Anthropocene, in which the Earth's climate is being radically modified by human action, creating a very different planet, one that may not be able to sustain organized human life in anything like a form we would want to tolerate.

There are plenty of things that are unknown, but are assumed reasonably to exist, even in the most basic sciences. Maybe 90 percent of the mass-energy in the universe is called "dark," because nobody knows what it is.

Technology can be used that way and it can also be used in other ways.

Language etches the grooves through which your thoughts must flow.

If you and I go into a store to rob it, and I say "shoot," that's not protected. Like all judicial decisions and legislation, this leaves plenty of gray areas, including many of great significance that are rarely discussed: advocacy of imminent war crimes, such as aggression, for example. I think we would all agree that such speech should be protected, despite the often horrific consequences, but it's worth noting that that stretches the doctrine to its limits.

Moves toward sovereignty in Iraq stimulate pressures first for human rights among the bitterly repressed Shi'ite population but also toward some degree of autonomy. You can imagine a kind of a loose Shi'ite alliance in Iraq, Saudi Arabia, and Iran, controlling most of the world's oil and independent of the United States. And much worse, although Europe can be intimidated by the United States, China can't. It's one of the reasons, the main reasons, why China is considered a threat. We're back to the Mafia principle.

I think we can be reasonably confident that if the American population had the slightest idea of what is being done in their name, they would be utterly appalled.