Moberg, a faculty member of Rockefeller University, assisted Dubos in the last decades of his career while he wrote his major works on the environment. She has written a biography of his life from his birth in 1901 to his death in 1982. She presents his science in the context of 20th century biology, medicine, and ecology. She describes the ecological approach that led to his discovery of the first antibiotic and was the foundation for his career as a medical scientist and environmentalist.