I am hoping, though, that many of them have kids, who, when they have a moment to take a break from their iPods, Internet, or Google, will explain to their parents running the country just how the world is being flattened.

When widely followed public figures feel free to say anything, without any fact-checking, it becomes impossible for a democracy to think intelligently about big issues.

Hillary Clinton has decided to line up with John McCain in pushing to suspend the federal excise tax on gasoline, 18.4 cents a gallon, for this summer's travel season. This is not an energy policy. This is money laundering: we borrow money from China and ship it to Saudi Arabia and take a little cut for ourselves as it goes through our gas tanks. What a way to build our country.

Pessimists are usually right and optimists are usually wrong but all the great changes have been accomplished by optimists.

The thing you have to remember is, oil and gas are commodities, and the more we use them the more the price goes up, like any commodity. Solar, wind - they are technologies, so the more you use them, the more the price goes down.

I don't think that stability and the status quo go together at all, not in a flat world where people are integrated, where women are assuming new roles, where young people want to be consulted and participate. I think the trick is to open up, move down the path of reform, do it in a way that is consistent with your own society's stability and culture, and just don't think you can do nothing.

Almost all the students who make it to Caltech, one of the best scientific universities in the world, come from public schools. So it can be done.