When the history of philosophy is painted in broad strokes, the philosophy of Descartes is generally regarded as the major watershed between classical and modern outlooks. Although Descartes himself was more concerned with epistemology and metaphysics than with axiology, his successors have generally drawn as an axiological corollary of his metaphysical bifurcation of reality the thesis that all final or intrinsic values, if they exist at all, exist only in the domain of conscious subjects, or at the very least as relata dependent upon such subjects. These subjects may indeed extend beyond humankind to include gods or beasts or even, according to the speculative flights of some, the “occasions of experience” of Whiteheadian panpsychists or the universal mind of the idealists. The common denominator of all these accounts, however, is that values essentially depend upon human or quasi-human entities, i.e., conscious, experiencing subjects. This post-Cartesian thesis is in marked contrast to the axiological realism of the classical world of Plato and Aristotle, which concurs with large segments of common sense in finding objects to exist with their axiological properties independently of human and similar subjects. The Cartesian legacy in axiology has been to encourage the exploration of human values and experiences of value while creating a moratorium on the investigation of subject-independent values.

C'est avec la grammaire générative (cf. Chomsky, 1966) que la discussion sur les rapports entre l'analyse linguistique et le rationalisme est devenue particulièrement abondante, en même temps qu'elle devenait une affaire idéologique concernant un large public. En présentant sa Cartesian Linguistics comme un chapitre dans l'histoire du rationalisme, Chomsky a prétendu avec éclat que: (i) il y aurait une tradition rationaliste ayant des idées précises sur le langage, liée aux thèses cartésiennes et à la grammaire générale de Port-Royal; (ii) la grammaire générative reprendrait cette tradition et lui apporterait une confirmation définitive. De manière générale, la validité historique des thèses de Chomsky a été contestée avec succès par les historiens: qu'il s'agisse de l'idée d'une linguistique cartésienne (Salmon, 1969; Aarsleff, 1982), de la prédominance du rationalisme aux dix-septième et dix-huitième siècles (Joly, 1977 et 1985), de l'identité de démarche entre Port-Royal et la grammaire générative (Pariente, 1975, 1985), voire même de la définition du rationalisme classique (Cooper, 1972 et la réponse dans Chomsky et Katz, 1975).

Recent literature on the Young Hegelians attests to a renewed appreciation of their philosophical and political significance. Important new studies have linked them to the literary and political currents of their time, traced the changing patterns of their relationships with early French socialism, and demonstrated the affinity of their thought with Hellenistic theories of self-consciousness. The conventional interpretative context, which focuses on the left-Hegelian critique of religion and the problem of the realisation of philosophy, has also been decisively challenged. Ingrid Pepperle emphasizes instead the centrality of practical philosophy, notably Hegel's dialectic of objectification, arguing that Bruno Bauer in particular derives from this a doctrine of autonomy with politically revolutionary implications.

Kripke's Wittgenstein on Rules and Private Language has enlivened recent discussion of Wittgenstein's later philosophy. Yet it is quite possible to disengage his interpretive thesis from its supporting argumentation. Doing so leaves one with an intriguing sceptical argument which Kripke first powerfully advances, then tries to halt. But contrary to the impression his argument may leave, Kripke's solution and the position it concedes to the Sceptic are deeply allied. Here I shall demonstrate their common assumption, and on that basis argue that Kripke's solution begs the Sceptic's question. Furthermore, I believe we can live with the Sceptic. The sceptical argument can be turned into a reasonable contribution to a kind of nominalism in the philosophy of meaning and truth.

Several recent commentators have suggested that for fully rational agents who find themselves in iterated prisoner's dilemmas of indefinite length, co-operation is the rational strategy. Their argument is that these fully rational agents can be taught, through the co-operative actions of other agents, to bypass the dominant move of noncooperation and co-operate instead. The proponents of the “teaching strategy” seem to have ignored the compelling argument of Jordan Howard Sobel. While the teaching argument may work for agents who are less than purely rational, Sobel has pointed out that hyperrational utility maximizers cannot be taught; they reason deductively, not inductively, as the “teaching argument” requires.

Ever since classical times, both Greek and Roman, friendship as a philosophical topic has been on the wane. The only notable exception is Montaigne's essay which, however, owes much to classical treatments. This decline of philosophical interest in friendship is not easy to account for. Alasdair McIntyre's overall thesis in After Virtue seemingly affords him with a ready interpretation. The progressive atomization of society, together with the concurrent growth of individualism that characterizes the modern era, claims McIntyre, are responsible for the demotion of friendship from the public to the private sphere.

David Lewis has shocked the philosophical community with his original version of extreme modal realism according to which “every way that a world could possibly be is a way that some world is”. Logical Space is a plenitude of isolated physical worlds, each being the actualization of some way in which a world could be, that bear neither spatiotemporal nor causal relations to each other. Lewis has given independent, converging arguments for this. One is the argument from the indexicality of actuality, the other an elaborate cost-benefit argument of the inference-to-the-best explanation sort to the effect that a systematic analysis of a number of concepts, including modality, causality, propositions and properties, fares better under his theory than under any rival one that takes a possible world to be either a linguistic entity or an ersatz abstract entity such as a maximal compossible set of properties, propositions or states of affairs. Lewis' legion of critics have confined themselves mostly to attempts at a reductio ad absurdum of his theory or to objections to his various analyses. The indexical argument, on the other hand, has not been subject to careful critical scrutiny. It is the purpose of this paper to show that this argument cannot withstand such scrutiny. Its demise, however, leaves untouched his argument from the explanatory superiority for his extreme modal realism.

The principle that epistemic justification is necessarily transmitted to all the known logical consequences of a justified belief continues to attract critical attention. That attention is not misplaced. If the Transmission Principle is valid, anyone who thinks that a given belief is justified must defend the view that every known consequence of the belief is also justification of the conclusion in an obviously valid argument. Once created, the gap is hard to fill, whatever the circumstances. Reflection principle is modified, the possibility of deductive justification is threatened. If some known consequence fails to be justified, the failure may extend to every known consequence. To reject Transmission is to insert a logical gap between the justification of a premise and the justification of the conclusion in an obviously valid argument. Once created, the gap is hard to fill, whatever the circumstances. Reflection on the Transmission Principle therefore usefully brings us face to face with the following dilemma: accept the principle and hand Cartesian scepticism a powerful weapon, or modify the principle and risk undermining deductive justification.

I like the idea behind this book. It is an empiricist alternative to the powerful and influential contemporary rationalist position on scientific law, causality, and counterfactuals, associated with Chisholm and David Lewis, which “takes its inspiration from modal logic and set theory [and] involves … an assumption of non-truth-functional connectives to define unanalyzable natural necessities, or defines such connectives and such necessities in terms of an ontology of possible worlds”. Wilson's views, springing from Hume and Nelson Goodman, involve no unobservables such as natural necessities or possible worlds, but are based instead on good old Humean laws of constant conjunction. How lovely if Wilson could pull this off!

Robert Martin, in his review of my Laws and Other Worlds, has grasped the thrust of much of the argument. I would like to respond to three specific points that he makes, and to add a couple of more general comments that will bring out some other aspects of the structure of the argument that he misses, to try to show why I think the sort of enterprise the book attempts is worthwhile, more important than Martin's own pragmatic tendencies will perhaps allow.