Historedia
Person

Jean-Baptiste Lamarck

Events
1
Episodes
2
Years
1809

Every event in Historedia whose sources name Jean-Baptiste Lamarck, with the role they cite and all of that event’s episodes. This is not a biography, and mentions are grouped by name, so two people with the same name can share this page.

Events and episodes

  1. Jean-Baptiste Lamarck publishes Philosophie Zoologique

    1809

    Role: Author

    1. 1809 · ParisPublication of Philosophie Zoologique

      Lamarck published Philosophie Zoologique in Paris in 1809, outlining his pre-Darwinian theory of evolution, part of which is now known as Lamarckism.

    2. 1809 · Doctrinal content of Philosophie Zoologique (1809)Formulation of Evolutionary Laws

      The book set out two laws: use or disuse causes body structures to grow or shrink over generations, and acquired modifications are preserved by reproduction.

Sources

  1. Jean-Baptiste Lamarck Wikipedia, revision of 2026-09-29
  2. Philosophie zoologique Wikipedia, revision of 2026-07-03