Darwin and Wallace
On June 18, 1858, Charles Darwin received a letter from Alfred Russel Wallace, a naturalist working in the Malay Archipelago, containing an essay outlining a theory of natural selection so closely parallel to Darwin's own unpublished work that Darwin described it as though Wallace had read his manuscript. Darwin had been developing the theory for twenty years. Wallace had arrived at the same conclusion independently, working with different specimens, different field conditions, and a different intellectual biography. The convergence was precise enough to constitute, in the judgment of both men and their contemporaries, a single discovery made by two minds. For Kroeber, the case is the canonical instance of simultaneous invention and the strongest empirical evidence that the theory of natural selection was not inside either mind but in the cultural configuration that carried both.
In the AI Story
The conditions for the theory of natural selection had matured to the point where the theory was, in a precise sense, culturally inevitable. The accumulation of biogeographical data from European voyages of exploration had made the distribution of species visible as a pattern requiring explanation. Malthus's essay on population had provided the mathematical framework of competition for limited resources — a framework available to both men, and acknowledged by both as a catalyst. The geological work of Lyell had established the immense timescales necessary for gradual biological change. The classificatory systems of Linnaeus and his successors had organized the living world into a hierarchy that implied shared ancestry even before anyone articulated the mechanism.
Remove any one of these accumulated cultural elements, and the theory does not emerge — not from Darwin, not from Wallace, not from anyone. The conditions are necessary, and when they are sufficient, the result expresses itself through whichever minds are positioned at the confluence.
Darwin and Wallace were positioned at different confluences within the same cultural current. Darwin was embedded in the British tradition of gentlemanly science, the institutional network of the Linnean Society and the Royal Society, and the economic conditions that allowed a man of independent means to devote decades to unpaid research. Wallace was embedded in the tradition of natural history collecting, the commercial networks that funded specimen gathering, and the specific geography of the Malay Archipelago that made patterns of species distribution visible. Both confluences led to the same theoretical destination because the superorganic current was flowing toward that destination through multiple channels simultaneously.
The joint presentation of Darwin's and Wallace's papers at the Linnean Society in July 1858, and Darwin's rushed completion of On the Origin of Species the following year, constituted the institutional resolution of what would otherwise have been an unresolved priority dispute. The resolution preserved the appearance of individual authorship while the structural reality — that two minds had arrived at the same theory because the configuration was ready for it — was known to both participants and quietly accepted.
Origin
The parallel discoveries of Darwin (beginning in 1838) and Wallace (culminating in 1858) occurred independently across twenty years, culminating in the joint Linnean Society presentation of July 1858. The case has been the touchstone for discussions of simultaneous invention in the history of science ever since.
Key Ideas
Precision of convergence. The parallel between Darwin's and Wallace's formulations was so close as to rule out coincidence and to require explanation in terms of shared conditions.
Different confluences, same destination. The two men's biographical positions were different, but the cultural current flowed through both toward the same theoretical result.
The configuration was necessary. Each of the enabling cultural elements — biogeographical data, Malthus, Lyell, Linnaeus — was required; removing any would have prevented the theory's emergence.
Individual authorship is preserved by convention. The institutional resolution that credited Darwin with the theory preserved the romantic ideology of individual genius while the structural reality remained visible to those who looked for it.
Appears in the Orange Pill Cycle
Further reading
- Charles Darwin, On the Origin of Species (John Murray, 1859)
- Alfred Russel Wallace, My Life (Chapman & Hall, 1905)
- Adrian Desmond and James Moore, Darwin (W.W. Norton, 1991)
- Robert K. Merton, Singletons and Multiples in Scientific Discovery (Proceedings of the American Philosophical Society, 1961)