The meaning and significance of Whitehead springs from his amazing capacity to take into account past philosophical and scientific adventures of ideas and to actualize them. At a time of major, even dramatic, ethical challenges and ideological uncertainties, this is precisely what this remarkable collection of essays brings about. To paraphrase Huxley (The Perennial Philosophy, 1947), Whitehead's legacy is the plummet and Whitheadian scholarship the astrolabe of this book, that aims at a nothing less than a second Renaissance.