The second international Chromatiques whiteheadiennes conference was devoted exclusively to the exegesis and contextualization of Whitehead's Science and the Modern World (1925). In order to elucidate the meaning and significance of this epoch-making work, the Proceedings are designed to form and "companion and " volume. With one paper devoted to each of its thirteen chapters, the Proceedings aim, on the one hand, to identify the specific contribution of each chapter to Whitehead's own research program - that is to say, to put its categories into perspective by means of an internal analysis- and, on the other hand, to identify its global impact in the history of ideas.