The key insight of Adam Smith's Wealth of Nations is misleadingly simple: if an exchange between two parties is voluntary, it will not take place unless both believe they will benefit from it. Most economic fallacies derive from the neglect of this simple insight, from the tendency to assume that there is a fixed pie, that one party can gain only at the expense of another.

Nothing is so permanent as a temporary government program.

Nobody spends somebody else's money as carefully as he spends his own. Nobody uses somebody else's resources as carefully as he uses his own. So if you want efficiency and effectiveness, if you want knowledge to be properly utilized, you have to do it through the means of private property.

I am in favor of cutting taxes under any circumstances and for any excuse, for any reason, whenever it's possible. ... because I believe the big problem is not taxes, the big problem is spending.

The Depression, which started in 1929 was rather mild from 1929 to 1930. And, indeed, in my opinion would have been over in 1931 at the latest had it not been that the Federal Reserve followed a policy which led to bank failures, widespread bank failures, and led to a reduction in the quantity of money.

Look, for example, at the obvious, immediate, practical example of illegal Mexican immigration. Now, that Mexican immigration, over the border, is a good thing. It's a good thing for the illegal immigrants. It's a good thing for the United States. It's a good thing for the citizens of the country. But, it's only good so long as its illegal....

I think there is universal agreement within the economics profession that the decline - the sharp decline in the quantity of money played a very major role in producing the Great Depression.