Erik Erikson

Erik Homburger Erikson (born Erik Salomonsen; 15 June 1902 – 12 May 1994) was a German-American developmental psychologist and psychoanalyst known for his theory on psychological development of human beings. He may be most famous for coining the phrase identity crisis. His son, Kai T. Erikson, is a noted American sociologist. https://en.wikipedia.org/wiki/Erik_Erikson