In 1911 he was President of the White Neutral Cross, the first Human Rights organization in Mèxico and intervened to stop the massacre in the political crisis named "Decena Tràgica" that culminated with the assassination of president of Mexico, Francisco I Madero.
Following the call on Madero during which Ambassador Wilson, with the British minister Francis Stronge and the German minister Paul von Hintze told President Madero that they protested against his continuing hostilities, Ambassador Wilson, accompanied by the British minister, went to the arsenal, called on Felix Díaz, and as Ambassador Wilson reports to Secretary Philander Knox that day, 'urged that firing be confined to a particular zone.
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A Diplomat's Wife in Mexico covers events in 1913 and 1914, when Madero was overthrown in a violent coup (the "Ten Tragic Days") by Victoriano Huerta on February 13, 1913 and murdered by the new regime.