The only reason there is a crisis about Social Security in the US and pensions in Europe and Japan is that you cannot maintain a "Ponzi" scheme indefinitely. We have collected from today's young to pay today's old and counted on tomorrow's young to keep doing so. That was a fine scheme as long as the number of young people was rising faster than old people. When that ratio comes to an end, such a system also has to end.

I am a limited-government libertarian.

You never have real changes unless you have a time of crisis.

When something goes wrong, the natural tendency is to say, "By God, we need to pass a law and do something."

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.

Socialism, in the traditional sense, meant government ownership and operation of the means of production. Outside of North Korea and a couple of other spots, no one in the world today would define socialism that way. That will never come back.

Personal freedom has grown greatly within China, and that will provoke ever more points of conflict between the individual and state.