Conservationists concerned about the Everglades have been a vocal minority ever since Miami was a young city. South Florida's first and perhaps most enthusiastic naturalist was Charles Torrey Simpson, who retired from the Smithsonian Institution to Miami in 1905 when he was 53. Nicknamed "the Sage of Biscayne Bay", Simpson wrote several books about tropical plant life around Miami. His backyard contained a tropical hardwood hammock, which he estimated he showed to about 50,000 people. Though he tended to avoid controversy regarding development, in Ornamental Gardening in Florida he wrote, "Mankind everywhere has an insane desire to waste and destroy the good and beautiful things this nature has lavished upon him".[69]