Departing from Pierre Bayle's discussion of Spinoza in the entry 'Japan' in his Dictionaire, this article discusses how debates about the Far East functioned as a foil for the polemics generated by the Radical Enlightement. The central point of investigation is a debate between Gerard Vossius and Georg Hornius, integrating three main issues where ideas about the East challenged accepted European authority: sacred history, republicanism, and natural philosophy. The article demonstrates that the onset of radicalism involved a plethora of old, (...) new and exotic ideas, from logic to linguistics and Hermeticism, before crystallizing into the scientific and political notions now associated with modernity. (shrink)