[The review is in German] Theunissen has developed an interesting account of metaphilosophy that–as a discipline–does not start in 1960s, but already and especially with Kant, Fichte and Hegel. The constant growth of philosophical theories around 1800 (what Koselleck called “Sattelzeit”) made metaphilosophical constructions necessary. He reads–and is not the first author who does so–Hegel’s Phenomenology of Spirit as a metaphilosophical theory. Although I like and share many ideas with Theunissen, there are three objections that I raise in my review: (i) His account of isosthenia as a basic problem behind all philosophical positions (which makes metaphilosophy necessary) undermines the importance of dissent, dogmatism and intra-philosophica...