Egon Spengler It is implied in one episode of the animated series that Spengler accidentally burned down his family's garage. Spengler is the only original Ghostbuster to return for the "Extreme Ghostbusters" series as a regular, acting as a mentor to the new Ghostbusters (the others appeared for a two-part episode, "Back in the Saddle"), and monitoring and sustaining the Containment Unit while working as a paranormal studies professor at a university. He is the de facto leader of the new, younger team of Ghostbusters; although the old team had gone into retirement after they apparently dealt with all the ghosts in
Oswald Spengler while Karl Popper called the thesis "pointless". The great historian of antiquity Eduard Meyer thought highly of Spengler, although he also had some criticisms of him. Spengler's obscurity, intuitionalism, and mysticism were easy targets, especially for the Positivists and neo-Kantians who rejected the possibility that there was meaning in world history. The critic and aesthete Count Harry Kessler thought him unoriginal and rather inane, especially in regard to his opinion on Nietzsche. Ludwig Wittgenstein, however, shared Spengler's cultural pessimism. Spengler's work became an important foundation for the social cycle theory. In late 1919, Spengler published "Prussianism and Socialism" ("Preußentum und