Wallace, Alfred Russel, 1823–1913, English naturalist. From his study of comparative biology in Brazil and in the East Indies, he evolved a concept of evolution similar to that of Charles Darwin Darwin, Charles Robert, 1809–82, English naturalist, b. Shrewsbury; grandson of Erasmus Darwin and of Josiah Wedgwood . He firmly established the theory of organic evolution known as Darwinism .
..... Click the link for more information. . Like Darwin, he was greatly influenced by the writings of Malthus Malthus, Thomas Robert (măl`thəs), 1766–1834, English economist, sociologist, and pioneer in modern population study.
..... Click the link for more information. and Lyell Lyell, Sir Charles (lī`əl), 1797–1875, British geologist.
..... Click the link for more information. and based his theories on careful observation. Wallace sent his paper on evolution to Darwin in 1858, and its striking coincidences to Darwin's own theory sparked the older, more cautious naturalist to publish On the Origin of Species the following year (and led Darwin's friends to move quickly to assure that his priority would be recognized). Wallace's especial contribution to the evidence for evolution was in biogeography; he systematized the science and wrote The Geographical Distribution of Animals (2 vol., 1876) and a supplement, Island Life (1881). His research in this field is commemorated in the name Wallace's line Wallace's line, imaginary line postulated by A. R. Wallace as the dividing line between Asian and Australian fauna in the Malay Archipelago. It passes between Bali and Lombok islands and between Borneo and Sulawesi, then continues S of the Philippines and N of the
..... Click the link for more information. . He also assisted H. W. Bates Bates, Henry Walter, 1825–92, English naturalist and explorer. In 1848 he went with A. R. Wallace to Brazil, where he explored the upper Amazon, returning in 1859 with some 8,000 new zoological species. He was the first to state a plausible theory of mimicry .
..... Click the link for more information. in evolving an early concept of mimicry mimicry, in biology, the advantageous resemblance of one species to another, often unrelated, species or to a feature of its own environment. (When the latter results from pigmentation it is classed as protective coloration .
..... Click the link for more information. . Wallace's other works include Contributions to the Theory of Natural Selection (1870), Darwinism (1889), and Social Environment and Moral Progress (1913).

Bibliography

See his autobiography (2 vol., 1905); selections of his writings, ed. by J. R. Camerini (2001) and A. Berry (2002); biographies by P. Raby (2001), M. Fichman (2004), R. A. Slotten (2004), and M. Shermer (2006).

Wallace, Alfred Russel

(born Jan. 8, 1823, Usk, Monmouthshire, Wales—died Nov. 7, 1913, Broadstone, Dorset, Eng.) British naturalist. Though trained as a surveyor and architect, he became interested in botany and traveled to the Amazon in 1848 to collect specimens. In 1854–62 he toured the Malay Archipelago, augmenting his collection. His observations of the islands led to his developing a theory of the origin of species through natural selection independently of, and simultaneously with, Charles Darwin, though Darwin developed his own theory in much greater detail, provided far more evidence for it, and was mainly responsible for its acceptance. Unlike Darwin, Wallace insisted that the higher mental capacities of humans could not have arisen by natural selection but that some nonbiological agency must have been responsible. He hypothesized a boundary (Wallace's line) running between the islands of the Malay Archipelago, between the Oriental and Australasian faunal regions, many animals abundant on one side being absent on the other. In the realm of public policy he supported socialism, pacifism, land nationalization, and women's suffrage. His works include Contributions to the Theory of Natural Selection (1870), Geographical Distribution of Animals (2 vol., 1876), and Darwinism (1889).