Alfred Russel Wallace

Alfred Russel Wallace
London Stereoscopic and Photographic Company (active 1855-1922) · Public domain · source
Name	Alfred Russel Wallace
Caption	Photograph from 1862
Birth date	08 January 1823
Birth place	Llanbadoc, Monmouthshire, Wales
Death date	07 November 1913
Death place	Broadstone, Dorset, England
Fields	Biology, Biogeography, Anthropology
Known for	Co-discoverer of Natural selection, Wallace Line
Awards	Royal Medal (1868), Copley Medal (1908), Order of Merit (1908)

Alfred Russel Wallace was a pioneering British naturalist, explorer, and social critic. He is best known for independently conceiving the theory of evolution through natural selection, prompting Charles Darwin to publish his own work in On the Origin of Species. Wallace's extensive fieldwork in the Amazon rainforest and the Malay Archipelago also established him as a founding figure of the field of biogeography.

Early life and education

Born in Llanbadoc, Monmouthshire, he was the eighth of nine children to Thomas Vere Wallace and Mary Anne Greenell. His formal education ended at Hertford Grammar School when his family's financial situation forced him into various apprenticeships, including one with his older brother John, a land surveyor. This work fostered a deep interest in the natural world, which was further stimulated by reading works like Thomas Malthus's An Essay on the Principle of Population and the travel narratives of Alexander von Humboldt. He later taught at the Collegiate School in Leicester, where he formed a crucial friendship with the entomologist Henry Walter Bates.

Exploration and scientific work

Inspired by the writings of Humboldt and William Henry Edwards, he embarked on his first major expedition to the Amazon Basin with Henry Walter Bates in 1848. After four years of collecting specimens, his return voyage in 1852 ended in disaster when the ship ''Helen'' caught fire and sank, destroying most of his collections. Undeterred, he undertook an eight-year expedition through the Malay Archipelago from 1854 to 1862, collecting over 125,000 specimens. His observations of the stark differences in fauna between Bali and Lombok led him to identify the biogeographical boundary now known as the Wallace Line.

Theory of evolution by natural selection

While suffering from a fever on the island of Ternate in 1858, he formulated the mechanism for evolutionary change. He articulated his ideas in an essay, "On the Tendency of Varieties to Depart Indefinitely from the Original Type", which he sent to Charles Darwin in Down House. Darwin, who had been developing the same theory for decades, arranged for the essay to be presented alongside his own unpublished writings at the Linnean Society of London. The joint publication, "On the Tendency of Species to form Varieties", was read on 1 July 1858, establishing the co-discovery of natural selection.

Other scientific contributions and interests

Beyond evolutionary theory, he made foundational contributions to biogeography, detailed in his seminal work The Geographical Distribution of Animals. He was a vocal critic of vaccination policies, serving as a key witness before the Royal Commission on Vaccination. His interests extended to spiritualism, which he embraced after attending séances, and he wrote controversial works on the subject like Miracles and Modern Spiritualism. He also engaged in debates on land nationalisation and was a proponent of socialism, influencing thinkers like George Bernard Shaw.

Later life, recognition, and legacy

In his later years, he continued to write prolifically, producing works such as Darwinism and his autobiography My Life. His scientific achievements were recognized with the Royal Medal in 1868, the Darwin Medal in 1890, the Copley Medal in 1908, and appointment to the Order of Merit that same year. He remained a somewhat controversial figure due to his unorthodox views on spiritualism and social issues. Today, he is celebrated as a co-founder of modern evolutionary biology, with institutions like the Natural History Museum, London and the Wallace Memorial Fund preserving his legacy.