<P> It was recently possible to show that Freud's model can be derived from evolutionary principles . It could further be shown, that conscious behavior in the evolutionary past becomes unconscious behavior today . </P> <P> The terms "id", "ego", and "super-ego" are not Freud's own . They are latinisations by his translator James Strachey . Freud himself wrote of "das Es", "das Ich", and "das Über - Ich"--respectively, "the It", "the I", and "the Over-I" (or "I above"); thus to the German reader, Freud's original terms are more or less self - explanatory . Freud borrowed the term "das Es" from Georg Groddeck, a German physician to whose unconventional ideas Freud was much attracted (Groddeck's translators render the term in English as "the It"). The word ego is taken directly from Latin, where it is the nominative of the first person singular personal pronoun and is translated as "I myself" to express emphasis . </P> <P> Figures like Bruno Bettelheim have criticized the way "the English translations impeded students' efforts to gain a true understanding of Freud ." by substituting the formalised language of the elaborated code for the quotidian immediacy of Freud's own language . </P>

Mead divided the self into three parts the id ego and superego