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.

The stock market crashed in October 1929. But that was not the cause of what caused the Great Depression. It was, in my opinion, a very minor element of it. What happened was that from 1929 to 1933 you had a major contraction which, in my opinion, was caused primarily by the failure of the Federal Reserve System, to follow the course of action for which it was set up. It was set up to prevent exactly what happened from 1929 to 1933. But instead of preventing it, they facilitated it.

The evidence of history speaks with a single voice. I do not know any exception to the proposition that if you compare like with like, the freer the system, the better off the ordinary poor people have been.

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.

One of the great mistakes is to judge policies and programs by their intentions rather than their results.

I think a major reason why intellectuals tend to move towards collectivism is that the collectivist answer is a simple one. If there's something wrong, pass a law and do something about it.

We do not influence the course of events by persuading people that we are right when we make what they regard as radical proposals. Rather, we exert influence by keeping options available when something has to be done at a time of crisis.