Publication of Philosophie Zoologique

Philosophie zoologique ("Zoological Philosophy, or Exposition with Regard to the Natural History of Animals") is an 1809 book by the French naturalist Jean-Baptiste Lamarck, in which he outlines his pre-Darwinian theory of evolution, part of which is now known as Lamarckism. The modern era generally remembers Lamarck for this theory of inheritance of acquired characteristics, also called soft inheritance or use/disuse theory, which he described in the work. The full title appears as Philosophie zoologique, ou Exposition des considérations relatives à l'histoire naturelle des animaux, published in Paris.