Rosi Braidotti has recently argued that the emerging scholarship on posthumanism should employ what she calls nomadic thinking. Braidotti identifies Gilles Deleuze’s work on Spinoza as the genesis of posthumanist ontology, yet Deleuze’s claims about nomadic thinking or nomadology come from his work on Leibniz. I argue that for posthumanist thought to theorize subjectivity beyond the human, it must use nomadology to overcome ontology itself. To make my argument, I demonstrate that while Braidotti is correct about Spinoza’s influence on Deleuze, his work on Leibniz is necessary to adequately conceptualize nomadology. I employ Deleuze and Guattari’s figure of the Thought-brain as a model for conceptualizing posthumanist subjectivity that they claim goes beyond the subject itself.

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