Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Aldo Leopold (January 11, 1887 April 21, 1948) was an American ecologist, forester, and environmentalist. He was a professor at the University of Wisconsin and is best known for his book A Sand County Almanac (1949), which sold over a million copies. Influential in the development of modern environmental ethics and in the movement for wilderness conservation, his ethics of nature and wildlife preservation had a profound impact on the radical wing of the environmental movement, with his biocentric or holistic ethics regarding land. He emphasized biodiversity and ecology and was a founder of the science of wildlife management.