Monday, May 13, 2019

The Guano Islands: Bird Turds and the Beginnings of U.S. Overseas Territories


n the mid-nineteenth century, explorers headed out to sea, hoping to claim new islands for the United States. One seemed promising: “These islands are small, high and rocky, barren and uninviting to the last degree, yet out of them has come wealth to stagger the dreams of oriental imagination.”  These islands held an extremely valuable resource. With high levels of both phosphorus and nitrogen, it was excellent for crops. In his 1850 State of the Union, President Millard Fillmore said this resource had “become so desirable an article to the agricultural interest of the United States that it is the duty of the Government to employ all the means properly in its power for the purpose of causing that article to be imported into the country at a reasonable price.”  This article would enable American farmers to produce on a larger scale, at a time when farming was undergoing vast changes as a result of the Industrial Revolution. This prized new resource was guano.


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