Leibniz on interactions between body and soul (mind) The brief form of Leibniz's view is that because of the pre-pestablished harmony, There is actually no interaction between soul (mind) and body because it is not needed. They only appear to interact. It is "as if" they interact. This is essentially the position of the double aspect theory of consciousness, where the links are not causal but simply bridges.
http://www.rogerbissell.com/id11aaa.html See below fior more details of Leibniz's theory: http://www.newadvent.org/cathen/09134b.htm "Every present state of a simple substance is a natural consequence of its preceding state, in such a way that its present is always the cause of its future" ("Monadologie," thesis xxii). "The soul follows its own laws and the body has its laws. They are fitted to each other in virtue of the pre-established harmony among all substances, since they are all representations of one and the same universe" (op. cit., thesis lxxviii) . From Descartes's doctrine that matter is essentially inert, Malebranche had drawn the conclusion that material substances cannot be true causes, but only occasions of the effects produced by God (Occasionalism). Leibniz wished to avoid this conclusion. At the same time, he had reduced all the activity of the monad to immanent activity. That is he had defined substance as action, and explained that the essential action of substance is representation He saw clearly, then, that there can be no interaction among monads. The monad, he said, has "no windows" through which the activity of other monads can enter it. The only recourse left him is to maintain that each monad unfolds its own activity, pursues, as it were, its career of representation independently of other monads. This would make each monad a monarch. If, however, there were no control of the activities of the monad, the world would be a chaos, not the cosmos that it is. We must, therefore, conceive that God at the beginning of creation so arranged things that the changes in one monad correspond perfectly to those in the other monads which belong to its system. In the case of the soul and body, for instance, neither has a real influence on the other: but, just as two clocks may be so perfectly constructed and so accurately adjusted that, though independent of each other, they keep exactly the same time, so it is arranged that the monads of the body put forth their activity in such a way that to each physical activity of the monads of the body there corresponds a psychical activity of the monad of the soul. This is the famous doctrine of pre-established harmony. "According to this system", says Leibniz, "bodies act as if (to suppose the impossible) there were no souls at all, and souls act as if there were no bodies, and yet both body and soul act as if the one were influencing the other" (op. cit., thesis lxxxii). Thus the monad is not really a monarch, but a subject of God's Kingdom, which is the universe, "the true city of God". Dr. Roger Clough NIST (ret.) 3/26/2013 "Coincidences are God's way of remaining anonymous." - Albert Einstein -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to firstname.lastname@example.org. Visit this group at http://groups.google.com/group/everything-list?hl=en. For more options, visit https://groups.google.com/groups/opt_out.