There has been much talk lately of America's Smoot-Hawley Tariff Act, which set off the protectionist dominoes in 1930. It is usually invoked by free traders to make the wrong point. The relevant message of Smoot-Hawley is that America was then the big exporter, playing the China role. By resorting to tariffs, it set off retaliation, and was the biggest victim of its own folly.