How can we interrogate Sartre's thought, which embraced philosophy, the novel, theater and the century, and tied conceptual adventure to political commitment? How can we dust off Sartre's clichés? In what way are we heirs to the new way of philosophizing he inspired, to this new way of posing problems? In other words, how is Sartre our contemporary?This essay takes an original approach to this question, comparing Sartre's philosophy of the opposition between man and the world with the thoughts of Spinoza, Nietzsche and Deleuze, to envisage the possibility of a politics resolutely oriented towards a post-humanist ecology.