This paper will examine the relation between philosophicalthought and the various milieus in which such thought takes place usingthe late work of Gilles Deleuze and Félix Guattari. It will argue that Deleuzeand Guattari’s assessment of this relation involves a rearticulation of philosophyas an historiophilosophy. To claim that Deleuze and Guattari promotesuch a form of philosophy is contentious, as their work is often noted forimplementing an ontological distinction between becoming and history,whereby the former is associated with the act of creation and the latter withretrospective representations of this creative process. Furthermore, whenelaborating on the creative nature of philosophical thought, Deleuze andGuattari explicitly refer to philosophy as a geophilosophy that is in contrastto history. Nevertheless, this paper will demonstrate that far fromabandoning the category of history, Deleuze and Guattari’s analysis of therelations between philosophical thought and relative milieus suggests to usan historical ontology and methodology that is a critical part of philosophy’snature.