Emil Kraepelin
Emil Kraepelin was a German psychiatrist. H. J. Eysencks Encyclopedia of Psychology identifies him as the founder of modern scientific psychiatry, as well as of psychopharmacology and psychiatric genetics. Kraepelin believed the chief origin of psychiatric disease to be biological and genetic malfunction. His theories dominated psychiatry at the start of the 20th century and, despite the later psychodynamic influence of Sigmund Freud and his disciples, enjoyed a revival at centurys end.
Kraepelin, whose father, Karl Wilhelm, was a former opera singer, music teacher, and later successful story teller, was born in 1856 in Neustrelitz, in the Duchy of MecklenburgStrelitz in Germany. He was first introduced to biology by his brother Karl,years older and, later, the director of the Zoological Museum of Hamburg.
Source: Wikipedia