Robert Nozick is a heavyweight among philosophers, and Invariances is just what one might expect from him. The book takes up a battery of core metaphysical questions: the nature of truth, objectivity, necessity, consciousness, and ethics. "My own philosophical bent is to open possibilities for consideration, not to close them," he writes. To that end, Invariances asks at least as many questions as it answers. Nonetheless, Nozick tackles his themes rigorously, making this a closely argued and engaging book.
Nozick is a political as well as theoretical thinker, and he is among the staunchest proponents of libertarianism. Here he widens his scope to investigate the metaquestions of philosophy and spells out his original conception of objectivity in the world. Nozick, who is Pellegrino University Professor at Harvard, writes with an analytic inclination that can be challenging for lay readers, but his arguments are always intelligent and intriguing. --Eric de Place
From Publishers Weekly
An ambitious, stimulating effort to revitalize the notions of truth and objectivity in a way that takes account of contemporary physics and biology, Nozick's latest book lays out an agenda at once bold and tentative: to propose "new and philosophically interesting" theses, but to aim only at exploration, not at conclusive proof. The Harvard professor's style is accessible, his approach refreshingly nondogmatic. A chapter on truth and relativism builds on quantum mechanics to yield the conclusion that truth is relative to time and place, but conscientiously makes room for the possibility that it is not. Nozick's proposal that truth "is what explains success in acting upon beliefs" is nicely nuanced, as is his argument that an "objective fact is one that is invariant under all admissible transformations." Despite the book's many strong points, there are weaknesses. Nozick is all too ready to accommodate philosophy to present-day scientific opinion, as if the former were the handmaiden of the latter. And although he is avowedly dedicated to opening "possibilities for consideration," he never considers the difference theism might make to his investigations. Even so, the book is a valuable inquiry into truth and objectivity in both the physical and mental worlds. (Oct.) Forecast: Nozick is a well-known philosopher within academia, and most university collections will be a lock for this title, as will many syllabi. Yet lay readers, if encouraged, will find it accessible, but requiring a preexisting commitment to the subject.
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