As South Korea shows, active participation in international trade does not require free trade. Indeed, had South Korea pursued free trade and not promoted infant industries, it would not have become a major trading nation. It would still be exporting raw materials (e.g., tungsten ore, fish, seaweed) or low-technology, low-price products (e.g., textiles, garments, wigs made with human hair) that used to be its main export items in the 1960s.

The invention of the printing press was one of the most important events in human history.

Above a certain level of income, the relative value of material consumption vis-a-vis leisure time is diminished, so earning a higher income at the cost of working longer hours may reduce the quality of your life. More importantly, the fact that the citizens of a country work longer than others in comparable countries does not necessarily mean that they like working longer hours. They may be compelled to work long hours, even if they actually want to take longer holidays.

People 'over-produce' pollution because they are not paying for the costs of dealing with it.

Financial markets need to become less, not more, efficient.

Self-interest, to be sure, is one of the most important, but we have many other motives - honesty, self-respect, altruism, love, sympathy, faith, sense of duty, solidarity, loyalty, public-spiritedness, patriotism, and so on - that are sometimes even more important than self-seeking as the driver of our behaviors.

In manufacturing, where mechanization and the use of chemical processes are much easier, it is easier to raise productivity than in services. In contrast, by their very nature, many service activities are inherently impervious to productivity increase without diluting the quality of the product.