Tiedemann in 1820
23 August 1781|
(now "Kassel, Hesse, Germany)
|Died||22 January 1861
|"Doctoral advisor||Johann Wilhelm Christian Brühl|
|Other academic advisors||"Conrad Moench
Georg Wilhelm Stein
Adalbert Friedrich Marcus
"Karl Kaspar von Siebold
"Franz Kaspar Hesselbach
|Influences||"Friedrich Wilhelm Joseph Schelling
"Samuel Thomas von Sömmerring
Tiedemann spent most of his life as professor of anatomy and physiology at "Heidelberg, a position to which he was appointed in 1816, after having filled the chair of anatomy and "zoology for ten years at "Landshut, and died at "Munich. He was elected member of the "Royal Swedish Academy of Sciences in 1827. In 1836, he was elected "Honorary Fellow of the "Royal College of Surgeons in Ireland.
Tiedemann was born at "Cassel, the eldest son of "Dietrich Tiedemann (1748–1803), a philosopher and psychologist of considerable repute. He graduated in medicine at "Marburg in 1804, but soon abandoned practice.
Tiedemann devoted himself to the study of natural science, and, upon moving to Paris, France, became an ardent follower of "Georges Cuvier. On his return to Germany he maintained the claims of patient and sober anatomical research against the prevalent speculations of the school of "Lorenz Oken, whose foremost antagonist he was long reckoned. His remarkable studies of the development of the human brain, as correlated with his father's studies on the development of "intelligence, deserve mention.
Tiedemann was one of the first persons to make a scientific contestation of racism. In his article entitled "On the Brain of the Negro, compared with that of the European and the Orang-outang" (1836), he argued based on craniometric and brain measures taken by him from Europeans and black men from different parts of the world that the then-common European belief that Negroes have smaller brains and are thus intellectually inferior is scientifically unfounded and based merely on the prejudice of travellers and explorers.
In 1827 he became correspondent of the Royal Institute of the Netherlands, when that became the "Royal Netherlands Academy of Arts and Sciences in 1851 he joined as foreign member. He was elected a Foreign Honorary Member of the "American Academy of Arts and Sciences in 1849.
Tiedemann was influenced by "Jean-Baptiste Lamarck and accepted the "transmutation of species. Science historian "Robert J. Richards has written that Tiedemann "joined the basic notion of species evolution, of a Lamarckian flavor, with the proposition that higher animals in their embryological development recapitulated the morphological stages of those lower in the scale."
In 2007, Brazilian geneticist Sergio Pena called Tiedemann an "anti-racist ahead of his time".
Um anti-racista à frente de seu tempo