Erik Homburger Erikson (born Erik Salomonsen; 15 June 1902 – 12 May 1994) was a German-American child psychoanalyst known for his theory on psychosocial development of human beings. He coined the phrase identity crisis. Despite lacking a university degree, Erikson served as a professor at prominent institutions, including Harvard, University of California, Berkeley, and Yale. A Review of General Psychology survey, published in 2002, ranked Erikson as the 12th most eminent psychologist of the 20th century. Source: Wikipedia (en)