 With his return to Frankfurt the year after the publication of both Eclipse of Reason and Dialectic of Enlightenment, Horkheimer’s academic production would largely consist of essays and lectures. He also left a number of unpublished texts from the period, including a set of notes and aphorisms published shortly after his death (along with a set of aphorisms from the early 30s titled Dämmerung) under the name Notizen 1950 bis 1969. There is no real systematic unity to these writings (Habermas 1993, p. 51 even refers to them as “shot through with contradictions”), but there are common themes that can be explored.