About Karl Abraham
Karl Abraham was an influential German psychoanalyst, and a collaborator of Sigmund Freud, who called him his 'best pupil'. In 1907 Abraham had his first contact with Sigmund Freud, with whom he developed a lifetime relationship. Returning to Germany, he founded the Berliner Society of Psychoanalysis in 1910.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.