The focus of this thesis lies on Rahel Jaeggis reconsideration of the term alienation, which is the task this philosopher of todays generation of the Frankfurt School undertook in her dissertation. The initial part of the thesis at hand offers a conceptual approach to the term alienation, followed by an investigation into the roots of the theory of alienation, using selected historical and philosophical attempts. These are the theories by Rousseau, Hegel, Marx, Adorno/Horkheimer and Sartre. After that, Jaeggis theory of alienation is explained and reproduced. All this leads to the question whether or not Jaeggi has succeeded in her attempt to update the theory of alienation, which clarifications she has brought about and what the achievements of her approach are. This critical reflection forms the closing part of the paper at hand.