Empiricisms reassesses the values of experience and experiment in European philosophy and comparatively. It traces the history of empirical philosophy from its birth in Greek medicine to its emergence as a philosophy of modern science. A richly detailed account in Part I of history’s empiricisms establishes a context in Part II for reconsidering the work of the so-called radical empiricists—William James, Henri Bergson, John Dewey, and Gilles Deleuze, each treated in a dedicated chapter. What is “radical” about their work is to return empiricism from epistemology to the ontology and natural philosophy where it began. Empiricisms also sets empirical philosophy in conversation with Chinese tradition, considering technological, scientific, medical, and alchemical sources, as well as selected Confucian, Daoist, and Mohist classics. The work shows how philosophical reflection on experience and a profound experimental practice coexist in traditional China with no interaction or even awareness of each other. Empiricism is more multi-textured than philosophers tend to assume when we explain it to ourselves and to students. One purpose of Empiricisms is to recover the neglected context. A complementary purpose is to elucidate the value of experience and arrive at some idea of what is living and dead in philosophical empiricism.