Marking the fiftieth anniversary of the publication of Death Instinct and Knowledge, we are pleased tointroduce a selection of unpublished documents stored in the Massimo Fagioli Archive (currently being sorted). These consist of notes and memoranda that the author wrote as the first publication approachedand correspondence with some colleagues to whom Fagioli had sent the newly released book, whichallow to have a closer look at the author’s thoughts when the book was being written and how it was received.