Darwin and Wallace: Evolution Theory Presented

Twenty men gathered at the Linnean Society of London on the evening of July 1, 1858, to hear scientific papers read aloud. None realized they were witnessing the public debut of the most transformative idea in the history of biology. Charles Darwin and Alfred Russel Wallace had independently arrived at the theory of evolution by natural selection, and their joint presentation that evening changed humanity s understanding of life on Earth. Darwin had been developing his theory for two decades, ever since returning from his voyage on HMS Beagle in 1836. He filled notebooks, bred pigeons, corresponded with naturalists worldwide, and agonized over the theological implications. He told almost no one. Then in June 1858, a letter arrived from Wallace, a young naturalist collecting specimens in the Malay Archipelago, describing a theory of evolution nearly identical to Darwin s own. The crisis was resolved by mutual friends Charles Lyell and Joseph Hooker, who arranged the joint presentation to establish both men s priority. Darwin s earlier writings were read alongside Wallace s essay, with neither author present — Darwin was mourning his infant son, who had just died of scarlet fever, and Wallace was still in Southeast Asia, unaware the presentation was happening. The audience reaction was muted. The society s president, Thomas Bell, later wrote in his annual report that the year had not been marked by any revolutionary discoveries. The papers generated almost no immediate discussion or controversy. Darwin, galvanized by the near-loss of his priority, rushed to complete On the Origin of Species, publishing it in November 1859. That book ignited the firestorm the Linnean Society presentation had not. Wallace never expressed resentment. He remained a lifelong supporter of Darwin s work and titled his own major book on evolution Darwinism.