Nils Heisterhagen is policy adviser of the SPD parliamentary group in Rhineland-Palatinate. Previously, he was policy advisor and speechwriter of the last two IG Metall chairmen. In early May 2018, his book The liberal illusion. Why we need a left-wing realism [in German] will be published in Dietz-Verlag. Most recently, he published the books: Criticism of Postmodernism in Springer-VS-Verlag and Existential Republicanism in Transcript-Verlag [both in German.