Eventually, Wallace furthered his research and made a map of the zoogeographical regions of the world. His pioneering contributions in this field earned him the title "father of biogeography."
Wallace was often incapacitated by tropical diseases. In 1858, during a bout of fever, he collected his thoughts from his observations, producing the idea of natural selection described in his “Ternate Essay.”
Wallace realized that if industrialized society fully takes over, the wildlife in this region could be permanently destroyed.