Simons examines the interrelations of Lessing's literary endings with modes of logical conclusion; he highlights how Goethe's narrative closures are forestalled by an uncontrollable vital force that was discussed in the sciences of the time; and he reveals that Kleist conceived of literary genres themselves as forms of reasoning. Kleist's endings, Simons demonstrates, mark the beginning of modernism. Through close readings of these authors and supplemental analyses of works by Walter Benjamin, Friedrich Hölderlin, and Georg Wilhelm Friedrich Hegel, he crafts an elegant theory of conclusions that revises established histories of literary genres and forms.