Wallace was one of the leading evolutionary thinkers of the 19th century, working on warning coloration in animals and reinforcement (sometimes known as the Wallace effect), a way that natural selection could contribute to speciation by encouraging the development of barriers against hybridisation.

Alfred Russel Wallace (born January 8, 1823, Usk, Monmouthshire, Wales—died November 7, 1913, Broadstone, Dorset, England) was a British humanist, naturalist, geographer, and social critic.

Alfred Russel Wallace (Usk (Monmouthshire in Wales), 8 januari 1823 – Broadstone (Dorset), 7 november 1913) was een Brits natuuronderzoeker, geograaf, antropoloog en bioloog (entomoloog).

Alfred Russel Wallace (1823-1913) was a man of many talents - an explorer, collector, naturalist, geographer, anthropologist and political commentator. Most famously, he had the revolutionary idea of evolution by natural selection entirely independently of Charles Darwin.

This site is dedicated to the life and work of Alfred Russel Wallace (1823 - 1913), was one of the greatest scientists of all time. His seminal contributions to biology rival those of his friend and colleague Charles Darwin, though he is far less well known.

Alfred Russel Wallace was a British naturalist who independently conceived the theory of evolution by natural selection, the same idea Charles Darwin had been developing in private for two decades.

Materials on and by the English naturalist and social critic Alfred Russel Wallace (1823-1913), including bibliographies, lists, commentaries, a biography, and the full-text of hundreds of his writings.

Materials on and by the English naturalist and social critic Alfred Russel Wallace (1823-1913), including bibliographies, lists, commentaries, a biography, and the full-text of hundreds of his writings.

But in the mid-1800s, Darwin and the British biologist Alfred Russel Wallace independently conceived of a natural, even observable, way for life to change: a process Darwin called natural selection. Interestingly, Darwin and Wallace found their inspiration in economics.

Project Gutenberg offers 78,749 free eBooks for iPhone, iPad, Kobo, Android and Kindle.