Answer:
William Crawford Gorgas, (born Oct. 3, 1854, Mobile, Ala., U.S.—died July 3, 1920, London, Eng.), U.S. Army surgeon who contributed greatly to the building of the Panama Canal by introducing mosquito control to prevent yellow fever and malaria.
Explanation:
First, it brought slavery to an end. Slavery ended with the ratification of the thirteenth amendment. Second, it showed Americans that fighting a civil war is not the way to go.
