This essay appropriates the understanding of ethics developed by Michel Foucault in his courses at the Collège de France from 1980 until his death in 1984, with the aim of formulating a progressive environmental politics. As such, it attempts to navigate some of the long–standing divides between the movement for animal rights and environmental ethics proper, finding in the practice of vegetarianism a form of self-relation that is conducive to critical forms of speech and politics. The final phase of Foucault's work is replete with insights into how the care of the self can serve as a resistance to forms of power and political stasis. This paper presents these unpublished materials, allowing for a glimpse of the unknown Foucault, and reinterprets vegetarianism as a form of self-practice that is linked with truth and critical speech.