As Bruno Latour confided to Le Monde earlier this year in one of his final interviews, philosophy was his great intellectual love. But across his long and immensely fertile intellectual life, Latour pursued that love by way of practically every other form of knowledge and pursuit – sociology, anthropology, science, history, environmentalism, political theory, the visual arts, theatre and fiction. In this way he was, above all, a philosopher of life in the comprehensive German sense of Lebensphilosophie. Lebensphilosophie, whose leading exponents included figures such as Friedrich Nietzsche and Martin Heidegger, enjoyed its intellectual heyday between the 1870s and the 1930s. It was a project that sought to make sense of the dramatic development of modern science and the way it invaded every facet of life. In the process, it relentlessly questioned distinctions between the subject and knowledge and the foundations of metaphysics. It spilled over into the sociology of a Max Weber or the Marxism of a György Lukács. In France, writer-thinkers such as Charles Péguy or Henri Bergson might be counted as advocates