The Last Word

Nagel's central claim is that reason is universal and objective: its principles have a validity independent of any particular point of view, culture, or practice . He rejects subjectivism and relativism in all their forms—the view that truth or validity is ultimately relative to a perspective, a community, or a set of practices. Nagel's primary argument is that subjectivism is self-refuting. Any attempt to deny the independent validity of reason must itself rely on reason to make its case; the subjectivist cannot coherently state their position without presupposing the very objectivity they deny . The book applies this argument across language, logic, science, and ethics, arguing that the outermost framework of all thought must be a conception of what is objectively the case .

Nagel's argument restates a Cartesian insight: challenges to the independent validity of reason must themselves assume that validity. If a subjectivist claims that all reasoning is perspective-bound, they are making a claim they present as valid independently of their perspective. If they explain reason as a product of non-rational forces, that explanation is itself offered as a rational account that we ought to accept because it is true, not merely because it is ours . Ruth Lessl Shively describes this as Nagel's restatement of the cogito: there are built-in limits to subjectivist doubt, because the act of doubting reason presupposes reason's authority . Nagel extends this insight to show that subjectivist moves in language, logic, science, and ethics all founder on the same incoherence.

In the final chapter, Nagel speculates that the appeal of subjectivism among modern intellectuals is partly driven by a 'fear of religion'—a resistance to any worldview that might resemble a religious cosmology . If reason is a capacity for grasping universal and objective truths, then there is a kind of natural sympathy between the human mind and the structure of reality, a picture that many secular thinkers find uncomfortably close to theism. Nagel, an atheist himself, insists that this fear should not drive philosophical conclusions, and that a rationalist worldview can be embraced without religious commitment . The chapter is controversial because it psychologizes the opposition rather than refuting it on purely philosophical grounds, though Nagel presents it as a diagnosis of a motive, not a substitute for argument.

Reception was strongly positive among rationalist-leaning philosophers. Colin McGinn, writing in The New Republic, called it 'a ringing defense of the rationalist conception of reason, and an uncompromising attack on the subjectivist conception,' adding that Nagel's argument 'is not only correct, it is also urgent' . The Times Literary Supplement praised Nagel for retaining closer links with 'the big puzzles and mysteries that first attract most people to philosophy' than is common in academic philosophy . Charles Larmore, reviewing in Ethics, was more critical, arguing that Nagel's defense of reason 'wrongly cuts short philosophical reflection' by treating the subjectivist challenge as wholly incoherent rather than engaging with the serious questions it raises about the relation between thought and practice . The book was named an Outstanding Academic Book of 1997 by Choice .

The Last Word extends the rationalist framework of The View from Nowhere but sharpens its focus. In the earlier book, Nagel argued that the tension between subjective and objective standpoints is the root of philosophical problems, and that neither standpoint can be eliminated. The Last Word takes a more combative stance: it argues that the objective standpoint, insofar as it is the standpoint of reason itself, cannot be coherently denied. Where The View from Nowhere diagnosed an irreducible tension, The Last Word insists that subjectivism is not a legitimate alternative standpoint but a failure to acknowledge the presuppositions of thought. The later book thus represents a hardening of Nagel's rationalism, moving from the description of a duality to a defence of one side against what he sees as its fashionable dismissal.

A frequent misconception is that 'the last word' refers to Nagel's own philosophical system or to a final answer to the problems he discusses. In fact, the title refers to the structure of justification: in any dispute about validity, the last word must lie with unqualified thoughts about how things are, thoughts that we cannot regard from outside as mere psychological dispositions . Nagel is not claiming to have the final word on reason; he is arguing that reason itself, by its very nature, claims the last word over its competitors. The book is a defence of that claim, not an assertion of Nagel's personal authority. A second misconception treats the book as a religious tract; Nagel is an atheist, and the 'fear of religion' chapter is a diagnosis of secular motives, not a profession of faith .