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.
Milton FriedmanYou can travel from one end of the industrialized world to the other and almost the only people you will find engaging in backbreaking toil are people who are doing it for sport. To find people whose day's toil has not been lightened by mechanical invention, you must go to the non-capitalist world.
Milton Friedman