E.O. Wilson

Who He Is

E.O. Wilson was an American biologist, naturalist, and writer whose work transformed how scientists and the public understand biodiversity, ecosystems, and the relationship between humans and the natural world. Born in Birmingham, Alabama in 1929, Wilson developed a lifelong obsession with ants as a child and went on to become the world's leading authority on ant biology at Harvard University. His research on island biogeography, conducted with Robert MacArthur in the 1960s, became a cornerstone of conservation biology by explaining how the size and isolation of a habitat determine the number of species it can support. Wilson coined the term "biodiversity" in its modern scientific sense and spent decades advocating for protecting half of Earth's land and sea to prevent mass extinction, a vision he called "Half-Earth." He wrote more than thirty books, including the Pulitzer Prize-winning works On Human Nature and The Ants, and continued working and writing until his death in December 2021 at age 92.

Why He Matters

E.O. Wilson gave the field of ecology a moral urgency to match its scientific rigor. He showed that understanding the complexity of life on Earth was not just an intellectual pursuit but a responsibility, and that the loss of species and ecosystems was a crisis for all of humanity. His concept of "biophilia," the idea that humans have an innate connection to other living things, gave ecologists a framework for explaining why the natural world matters to people even when they have never studied it. For young people considering ecology, Wilson's career is proof that a childhood spent watching insects in the backyard can lead to a life of discovery that reshapes the world's view of the living planet.