Tradicionalmente se le atribuye a Descartes la tesis del «animal-máquina». De acuerdo con ésta los animales carecen de capacidades cognitivas, emociones y, en general, de conciencia. Esta interpretación, que todavía sigue vigente, se apoya en los avances de la filosofía natural cartesiana, que rompió con la aristotélico-escolástica, de carácter cualitativo, proponiendo un modelo físico-matemático cuantitativo mucho más cercano al nuestro. Pero, la propuesta de Descartes en su vertiente fisiológica, que en el fondo supone una concepción del ser humano innovadora, dejaba (...) muchas cosas por fuera: como la vida, la salud, o los fines de la conducta. Sin embargo, tales elementos reaparecen en su tratamiento terapéutico y moral de las pasiones, al considerar al sujeto como unión primitiva de mente y cuerpo. Dicha solución cartesiana también puede alcanzar a los animales que, concluiremos, no necesariamente son frías y desapasionadas máquinas. (shrink)

I argue that Descartes is not a reductionist about life, but dissolves or eliminates the category entirely. This is surprising both because he repeatedly refers to the life of humans, animals, and plants and because he appears to rely on the category of life to construct his physiology and medicine. Various attempts have been made in the scholarship to attribute a principled concept of life to Descartes. Most recently, Detlefsen has argued that Descartes “is a reductionist with respect to explanation (...) of life phenomena but not an eliminativist with respect to life itself”. I show that all these attempts either result in arbitrariness or force Descartes's wider philosophical project into incoherence. I argue that Descartes's ontological commitments make a principled concept of life impossible, that he does not need such a concept, and that his project ends up more coherent without one. (shrink)

At various points in his work on physiology and medicine, Descartes refers to a “principle of life.” The exact term changes—sometimes, it is the “principle of movement and life”, sometimes the “principle underlying all [the] functions” of the body —but the message seems consistent: the phenomena of living bodies are the product of a single, underlying principle. That principle is generally taken to be cardiac heat.1 The literature has, quite reasonably, taken this message at face value. Thus, Shapiro: “Descartes insists (...) again and again that the human body is properly to be described as a machine whose workings are […] driven by the heat in the heart that... (shrink)

Descartes is usually taken to be a strict reductionist, and he frequently describes his work in reductionist terms. This dissertation, however, makes the case that he is a nonreductionist in certain areas of his philosophy and natural philosophy. This might seem like simple inconsistency, or a mismatch between Descartes's ambitions and his achievements. I argue that here it is more than that: nonreductionism is compatible with his wider commitments, and allowing for irreducibles increases the explanatory power of his system. Moreover, (...) Descartes depends on nonreductionist knowledge and on irreducibles in order to maintain his epistemology and metaphysics. That is, there is more in the Cartesian world than mind, matter, and God. (shrink)