This is an important book. It is obviously a book based on a lifetime of eminent scientific work and deep questioning. R. Ulanowicz's views are plainly and positively presented. It is an extremely well-written book, one that is exceedingly well thought out. This is saying quite a lot considering that the author persuasively presents fundamental conceptual shifts in conventional scientific thinking, clearly building his case from chapter to chapter. By the final two chapters, the "third view" is shown to be astonishingly impressive and promising. While based on fewer postulates than the Newtonian-Darwinian "metaphysics," the author submits that it can provide greater explanatory power for complex, living organisms or systems.