Analysis of information sources in references of the Wikipedia article "Melanie Klein" in English language version.
It is a little odd that Freud himself never, except in conversation, used for the death instinct the term Thanatos, one which has become so popular since. At first he used the terms "death instinct" and "destructive instinct" indiscriminately, alternating between them, but in his discussion with Einstein about war he made the distinction that the former is directed against the self and the latter, derived from it, is directed outward. Stekel had in 1909 used the word Thanatos to signify a death-wish, but it was Federn who introduced it in the present context.
