Aldo Leopold (1887-1948) was an American ecologist, forester, and environmentalist, widely regarded as the father of wildlife management and the science of ecology. He is best known for his book, A Sand County Almanac, which emphasizes the importance of a land ethic and the interconnectedness of all living things. Leopold's work laid the foundation for modern conservation practices. In addition to his writing, Leopold was a professor at the University of Wisconsin-Madison and helped establish the U.S. Forest Service. His ideas have influenced generations of conservationists and environmentalists, promoting a sustainable relationship between humans and the natural world.