Aldo Leopold (January 11, 1887 - April 21, 1948) was a United States ecologist, forester, and environmentalist. He was influential in the development of modern environmental ethics and in the movement for wilderness preservation. Aldo Leopold is considered to be the father of wildlife management in the United States and was a life-long fisherman and hunter. Leopold died in 1948 from a heart attack, while fighting a brush fire on a neighbor's farm.