Self-interest is not myopic selfishness. It is whatever it is that interests the participants, whatever they value, whatever goals they pursue. The scientist seeking to advance the frontiers of his discipline, the missionary seeking to convert infidels to the true faith, the philanthropist seeking to bring comfort to the needy - all are pursuing their interests, as they see them, as they judge them by their own values.

The proper role of government is exactly what John Stuart Mill said in the middle of the 19th century in "On Liberty." The proper role of government is to prevent other people from harming an individual. Government, he said, never has any right to interfere with an individual for that individual's own good.

Hong Kong is the bellwether. If the Chinese stick to their agreement to let Hong Kong go its own path, then China will also go that way. If they don't, that is a very bad sign. I'm optimistic.

The big issue is whether the United States will succeed in its venture of reshaping the Middle East. It is not clear to me that using military force is the way to do it. We should not have gone into Iraq. But we have.

The only relevant test of the validity of a hypothesis is comparison of prediction with experience.

You must distinguish sharply between being pro free enterprise and being pro business.

Anything that government can do, private enterprise can do for half the cost.