This chapter explores Gilles Deleuze and Félix Guattari's concept of becoming and the potentialities it might offer theorisation in spatial planning. Deleuze offers ideas and concepts designed to challenge and disrupt our theoretical and practical understanding and a "tool-box" for thinking and working differently in the more-than-human worlds innovative thinkers encounter. Becoming is a cornerstone of Deleuze's thinking. Deleuze attempts to render becoming ontologically independent from being. Being is a post-facto social abstraction of the becoming of forces that encounter each other and manifest themselves together. All becomings are, first and foremost, becoming-minor: becoming-woman, becoming-animal, and becoming-world. One of the main concepts that Deleuze and Guattari offer planning theory is that of pragmatics: "a set of tools for undoing certain habitual ways of being in the world" and for creatively doing things differently. Becoming-revolutionary is concerned with challenging and overturning existing, normalising orders in order to diagram and machine something new.