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📘 The idea had two routes into print

June 1858: Wallace’s essay from the Malay Archipelago lands on Darwin’s desk. Both men had reached natural selection by different routes — and the Linnean Society would read their papers together in July.

3
lessons
~15 min
to learn
Adults
level
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What you’ll learn

  1. Independent routes to one mechanismExplain how Darwin and Wallace reached natural selection by independent routes and state the mechanism.Two investigators converged on variation, inheritance, struggle, and time as an explanatory filter.
  2. The evidence behind the methodConnect domestication, geography, and comparative data to the mechanism.Artificial selection and distribution patterns supported descent with modification.
  3. The 1858 publication and afterTrace the Linnean reading, Origin of Species, and the controversy that followed.Publication made the theory public; Darwin’s 1859 book expanded and defended it.

Questions this course answers

What four-part mechanism did Darwin and Wallace explain?

Natural selection depends on heritable variation, differential survival or reproduction, and accumulation across generations.

Why is artificial selection useful in Darwin's argument?

Breeding demonstrates that selection can accumulate small differences; Darwin then asks whether nature can sort without a breeder.

What happened at the Linnean Society on 1 July 1858?

The papers were read together while both authors were absent, then published in the Society's journal.

Which statement best handles the priority debate?

The evidence supports both Darwin's earlier development and Wallace's independent 1858 formulation.

What did the 1859 Origin add to the 1858 announcement?

Darwin's book expanded the mechanism into an organized argument across domestication, struggle, geology, geography, and classification.

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