 In the late 1930s, Horkheimer described all of his efforts as working toward a project on dialectical logic (Wiggershaus 1994, 177). This “dialectics project” would, through many twists and turns, develop into ideas presented primarily in two books published in 1947. Horkheimer was the sole author of Eclipse of Reason, which appeared originally in English. The book incorporates and expands on a series of lectures delivered at Columbia University in 1944, and, as Horkheimer writes in its preface, presents “in epitome some aspects” of his work with Adorno from that time (p. vi). That work with Adorno would also produce Dialectic of Enlightenment, a collaborative text that was first published in 1947, after having been distributed as a limited edition typescript in 1944. It would become the most famous work of the “first generation” of the Frankfurt School, and is surely the work most commonly associated with Horkheimer’s  name.[4]  The rest of this section will review the major themes of Horkheimer’s work from the 1940s, considering both Dialectic of Enlightenment and Eclipse of Reason together.