The following study tries to elucidate the connection between the discourse of natural philosophy in the late eighteenth century and Wilhelm von Humboldt's anthropological, aesthetic and linguistic writings. The concepts of force, organism and, most significantly, of generation, as they were developed in the natural sciences, are shown to have strongly influenced Humboldt's philosophy. ;The first chapter reconstructs the scientific discussion about biological generation in the 18th century. At the end of the century, the widely accepted theory of preformationism is (...) challenged and replaced by the epigenetic model of generation, according to which each organism is individually produced by both parents and the workings of a formative force. ;The second chapter interprets the significance of this change for the philosophy of German Idealism, most notably in the works of Kant and Fichte. Epigenesis and its key concepts, such as "formative impulse" , organism and individuality is shown to provide a biological base for the idealist theories of subjectivity and freedom. ;The third chapter investigates Humboldt's involvement in the discourse and practice of natural philosophy during his studies at Gottingen and Jena. He discussed these problems frequently with his brother Alexander and his friends Schiller, Goethe and Fichte. His famous articles on the significance of sexual difference can be understood as a philosophical interpretation of his own scientific studies. ;The fourth chapter shows the main concepts of natural philosophy at work in Humboldt's mature writings about the philosophy of language. Against the backdrop of Goethe's scientific work, Humboldt's linguistic theory appears as an application of scientific notions to the "organism" of language. ;The fifth chapter concentrates on Humboldt's account of the mutual dependence and the mutual generation of language and thought. With his epigenetic account he tries to overcome the impasses of earlier 18th century theories of language. ;The last chapter focuses on the essential element in Humboldt's linguistic theory, the problem of articulation. Humboldt interprets articulation seen from the side of the subject as an act of violence, opposed to the material power of historically given languages. This interplay between violence and power is also shown to be at the center of Humboldt's hitherto unnoticed poetic works. (shrink)