The tariff policies of 1890-1922 led to the development of a tariff system which launched trade wars of the 1930s.

The tariff policies of the 1890-1922 led to the development of tariff rates that launched the United States on a path that led to later trade wars. The Republican Party and Porter McCumber took the lead in promoting these policies, claiming that the tariff would protect new and struggling industries. In many instances, items subjected to high tariffs were not in conflict with industries in the United States. In addition, although the tariff covered agricultural products, it was not sufficient to halt an agricultural decline. This work traces the course of U.S. policy through five tariffs which preceded the Fordney-McCumber tariff of 1922, when the tariff was used for both protection and revenue. McCumber's economic nationalism combined with his internationalism in other areas is detailed in the work.