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Ernst Haeckel

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Ernst Heinrich Philipp August Haeckel (; German: [ɛʁnst ˈhɛkl̩]; 16 February 1834 – 9 August 1919) was a German zoologist, naturalist, eugenicist, philosopher, physician, professor, marine biologist and artist. He discovered, described and named thousands of new species, mapped a genealogical tree relating all life forms and coined many terms in biology, including ecology, phylum, phylogeny, ontogeny, and Protista. Haeckel promoted and popularised Charles Darwin's work in Germany and developed the disproven but influential recapitulation theory (summed up by the dictum "ontogeny recapitulates phylogeny"), later generalizing it into the so called "Biogenetic Law". He wrongly claimed that an individual organism's biological development, or ontogeny, parallels and summarizes its species' evolutionary development, or phylogeny, using incorrectly drawn images of human embryonic development to derive the law. Whether they were intentionally falsified, or drawn poorly by accident is a matter of debate.

The published artwork of Haeckel includes over 100 detailed, multi-colour illustrations of animals and sea creatures, collected in his Kunstformen der Natur ("Art Forms in Nature"), a book which would go on to influence the Art Nouveau artistic movement. As a philosopher, Ernst Haeckel wrote Die Welträthsel (1895–1899; in English: The Riddles of the Universe, 1900), the genesis for the term "world riddle" (Welträtsel); and Freedom in Science and Teaching to support teaching evolution. He also coined the "Biogenetic Law".

Haeckel promoted scientific racism and embraced the idea of Social Darwinism. He was the first person to characterize the Great War as the "first" World War, which he did as early as 1914.

Overview adapted from Wikipedia (CC BY-SA 4.0; see the article history for authors).

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The most insignificant Doctor of Philosophy, nay, even the student, has no further use for a complete "system." In the modern state, it is predicated that every citizen is able to pass judgment on all the questions upon which he is called upon to vote; in political economy it is assumed that every consumer is thoroughly acquainted with all commodities, which he has occasion to buy to maintain himself withal, and the…
Friedrich Engels, Landmarks of Scientific Socialism
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In its primary stage, every germ consists of a substance that is uniform throughout, both in texture and chemical composition. The first step is the appearance of a difference between two parts of this substance; or, as the phenomenon is called in physiological language, a differentiation. Each of these differentiated divisions presently begins itself to exhibit some contrast of parts; and by and by these secondary…
Herbert Spencer, Essays on education and kindred subjects
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The group marriage, that form in which whole groups of men and whole groups of women mutually belong to one another, leaving only small scope for jealousy. And furthermore we find at a later stage the exceptional form of polyandry which still more supersedes all sentiments of jealousy and hence is unknown to animals. But all the forms of the group marriage known to us are accompanied by such peculiarly complicated…
Friedrich Engels, The origin of the family, private property, and the state
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Ernst Haeckel

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