Believers in aristocracy and socialism share a faith in centralized rule, in rule by command rather than by voluntary cooperation. - Milton Friedman

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.

Even the most ardent environmentalist doesn't really want to stop pollution. If he thinks about it, and doesn't just talk about it, he wants to have the right amount of pollution. We can't really afford to eliminate it - not without abandoning all the benefits of technology that we not only enjoy but on which we depend.

The Great Depression, like most other periods of severe unemployment, was produced by government mismanagement rather than by any inherent instability of the private economy.