Smoot-Hawley Tariff
The 1930 American tariff that raised duties on more than twenty thousand goods, drew retaliation from every major trading partner, and became the cautionary tale of protectionism.
The Tariff Act of 1930, known by the names of its sponsors, Senator Reed Smoot of Utah and Representative Willis Hawley of Oregon, raised American import duties on more than twenty thousand categories of goods. It pushed the average rate on dutiable imports to roughly forty-five percent, among the highest in the country's history. Herbert Hoover signed it on 17 June 1930, eight months after the stock market crash.
It has since become shorthand for economic self-harm, invoked in every trade debate for ninety years. The reality is more interesting than the caricature in both directions: it did less damage than legend says, and it taught a lesson more important than the one usually drawn.
How it happened
It began as farm relief. American agriculture had been depressed through the 1920s, well before the rest of the economy, and Hoover campaigned in 1928 on raising duties to protect farmers.
What arrived in Congress was a bill on agriculture. What left was a bill on everything. Once the tariff schedule was open, every industry with a lobbyist and a friendly member arrived to ask for its own line, and each concession created a claim from the next sector, since a manufacturer whose inputs were now protected needed protection on his output too. The process is the classic demonstration of concentrated benefits and diffuse costs: the beneficiaries of each individual line were organized and specific, and the people who would pay were everyone.
The opposition was unusually clear-eyed. In May 1930, 1,028 economists signed a public petition asking Hoover to veto the bill, warning that it would raise prices, that it would provoke retaliation, and that it would make it harder for foreign debtors to earn the dollars needed to repay their war loans. Henry Ford reportedly called it economic stupidity. Hoover privately disliked the bill and signed it anyway, because vetoing his own party's flagship legislation was politically impossible.
What followed
Retaliation was immediate and broad. Canada, then America's largest trading partner, raised duties and shifted purchasing toward Britain. Spain, Italy, Switzerland, and others responded in kind, and Britain abandoned nearly a century of free trade in 1932 for a system of imperial preference that discriminated against American goods specifically.
Between 1929 and 1933, American imports fell by roughly two thirds and exports by a similar share. World trade contracted by about the same proportion.
The honest historian's caveat is that most of that collapse was caused by the Great Depression itself and by the monetary chaos around the gold standard, not by the tariff. Trade falls when incomes and credit collapse. Serious estimates of Smoot-Hawley's own contribution to the fall in US output are small, a fraction of a percent.
But the smaller economic effect coexists with a large political one. The tariff, and the retaliation it triggered, helped fragment the world economy into hostile trading blocs at precisely the moment cooperation was needed, and that fragmentation belongs in the causal chain that runs toward 1939.
The echo
The reaction against it built the postwar order. Congress passed the Reciprocal Trade Agreements Act in 1934, handing the president authority to negotiate tariff reductions bilaterally, which moved tariff-setting away from the log-rolling floor of Congress that had produced the disaster. That delegation is the institutional ancestor of everything after: GATT in 1947, eight rounds of multilateral liberalization, and eventually the World Trade Organization.
The lesson usually drawn, that tariffs cause depressions, is not quite right and is easy to rebut. The lesson worth keeping is about process. Smoot-Hawley shows what happens when trade policy is written line by line by a legislature responding to whoever shows up, in a world where every other government can respond in kind. Nobody in Congress in 1930 intended to trigger a global round of retaliation. They intended to help a constituent.