Leibniz believes that if there are corporeal substances, they have substantial forms, believes there are substantial forms, and believes there is a close connection between the first two claims. Why does he believe there is this close connection? This paper answers that question and draws out its bearing on the realism/idealism debate.

In this paper I consider a cluster of positions which depart from the immortalist and dualist anthropologies of Rene Descartes and Henry More. In particular, I argue that John Locke and Isaac Newton are attracted to a monistic mind-body metaphysics, which while resisting neat characterization, occupies a conceptual space distinct from the dualism of the immortalists, on the one hand, and thoroughgoing materialism of Thomas Hobbes, on the other. They propound a sort of property monism: mind and body are distinct, (...) with distinct characteristics and functions, but are, nevertheless, ontologically interdependent. Consciousness ? the locus of personhood, and thus, a necessary condition for personal immortality ? is an embodied phenomenon; its preservation requires the life and proper functioning of the body. Dying with the dissolution of his body, then, man is a compound wholly mortal. Nevertheless, both Locke and Newton accepted the possibility of personal immortality; with Hobbes, both looked to the Biblical promise of bodily resurrection. For with the re-vitalization of the body ? and a subsequent restoration of consciousness and memory ? personal identity is preserved, even beyond the grave. (shrink)

Pese a que el concepto de _expresión_ es uno de los conceptos más centrales en la filosofía de Leibniz, el tratamiento que ha recibido mayoritariamente dentro de la literatura especializada sigue siendo escaso, parcializado e insuficiente. Es parcializado, puesto que se lo suele interpretar bien en calve _solo _metafísica, dejando sin demarcar el tipo particular de la relación expresiva; o bien desde el _mero_ análisis de la relación expresiva como isomórfica, dejando sin atender su contenido metafísico. No solo suelen dejarse (...) ambas tendencias recíprocamente fuera de consideración, sino que ninguna de las dos suele atender a un aspecto fundamental de la expresión: el cuerpo propio de la mónada como _lugar_ para su punto de vista expresivo. El presente trabajo ofrece una reconstrucción del concepto de expresión que reconcilia ambas clases de interpretación, atendiendo, a la vez, a la exigencia del cuerpo para la acción expresiva. (shrink)

Gottfried Wilhelm Leibniz (1646–1716) was one of the great thinkers of the seventeenth and eighteenth centuries and is known as the last “universal genius”. He made deep and important contributions to the fields of metaphysics, epistemology, logic, philosophy of religion, as well as mathematics, physics, geology, jurisprudence, and history. Even the eighteenth century French atheist and materialist Denis Diderot, whose views could not have stood in greater opposition to those of Leibniz, could not help being awed by his achievement, writing (...) in his Encyclopedia, “Perhaps never has a man read as much, studied as much, meditated more, and written more than Leibniz… What he has composed on the world, God, nature, and the soul is of the most sublime eloquence. If his ideas had been expressed with the flair of Plato, the philosopher of Leipzig would cede nothing to the philosopher of Athens.” (Vol. 9, p. 379) Indeed, Diderot's mood was almost despairing in a remark from another piece, which also has a great deal of truth in it: “When one compares the talents one has with those of a Leibniz, one is tempted to throw away one's books and go die quietly in the dark of some forgotten corner.” More than a century later, Gottlob Frege, who fortunately did not cast his books away in despair, expressed similar admiration, declaring that “in his writings, Leibniz threw out such a profusion of seeds of ideas that in this respect he is virtually in a class of his own.” (“Boole's logical Calculus and the Concept script” in Posthumous Writings , p. 9) The aim of this entry is primarily to introduce Leibniz's life and summarize and explicate his views in the realms of metaphysics, epistemology, philosophical theology, and natural philosophy. (shrink)

One of Julian Barbour’s main aims is to solve the problem of time that appears in quantum geometrodynamics (QG). QG involves the application of canonical quantization procedure to the Hamiltonian formulation of General Relativity. The problem of time arises because the quantization of the Hamiltonian constraint results in an equation that has no explicit time parameter. Thus, it appears that the resulting equation, as apparently timeless, cannot describe evolution of quantum states. Barbour attempts to resolve the problem by allegedly eliminating (...) time from his interpretation of QG. In order to evaluate the efficacy of his solution, it is necessary to ascertain in what sense time has been eliminated from his theory. I proceed to do so by developing a form of conceptual analysis that is applicable to the concept of time in physical theories and applying this analysis to Barbour’s account. (shrink)