This final chapter examines Husserl’s essay, The Origin of Geometry ‘reactivation’ of a Historie temporal horizon of existence between subject that has been developed in the preceding chapters. Sophical work, The Crisis of European Sciences Phenomenology: An Introduction to Phenomenological Thought (1954) societies.1 knowledge (i.e., irrefutable reason) reveals its virtue for generating in thought. Yet this potential for clear thinking also modern sciences have become separated from their ‘extra-scientific’ historical and cultural values. He shows how geometry is, in fact, exemplary of a special ‘spiritual’ class of ontological entities (a special category of life), which cannot be sufficiently explained by the opposing metaphysical orders developed by empirical (materialist) and objective (idealist) philosophies. Instead, he proposes that geometry is a ‘living science’, which is constituted by an internal genetic or living ‘tradition’ (CES, p. 356).2 Calling this special ‘spiritual’ or ‘teleological’ progression and recollection of geometric ideas, ‘Historie’, the Origin recovers an existential reason in geometric thinking. In addition, this complex geometric discussion provides an important illustration of the new kind of phenomenology that Husserl develops in the Crisis, in which historical imperatives are reinstated into ontological philosophy (CES, pp. 354–5).