Thursday, 3 January 2013

W is for Windowless Monad

Pre-established harmony

From Wikipedia, the free encyclopedia

Gottfried Leibniz's theory of pre-established harmony (French: harmonie préétablie) is a philosophical
theory about causation under which every "substance" only affects itself, but all the substances 
(both bodies and minds) in the world nevertheless seem to causally interact with each other because
they have been programmed by God in advance to "harmonize" with each other. Leibniz's term for 
these substances was "monads" which he described in a popular work (Monadology §7) as 

An example:An apple falls on Alice's head, apparently causing the experience of pain in her mind.
In fact, the apple does not cause the pain - the pain is caused by some previous state of Alice's mind.
If Alice then seems to shake her hand in anger, it is not actually her mind that causes this, but 
some previous state of her hand.

Leibniz's theory is best known as a solution to the mind-body problem of how mind can interact with
the body. However, Leibniz also rejected the idea of physical bodies affecting each other, and 
explained all physical causation in this way.

Under pre-established harmony, the preprogramming of each mind must be extremely complex, since
 only it itself causes its own thoughts or movements, for as long as it exists. In order to appear to
 interact, each substance's "program" must contain a description of either the entire universe, or of 
how the object is to behave at all times, during all "interactions" which will appear to occur.

It can also be noted that if a mind behaves as a windowless monad, there is no need for any other
 object to exist in order to create that mind's sense perceptions, leading to a solipsistic universe 
consisting only of that mind. Leibniz seems to admit this in his Discourse on Metaphysics section 14.
However, he claims that his Principle of Harmony, according to which God creates the best and
 most harmonious world possible, dictates that the perceptions (internal states) of each monad 
"expresses" the world in its entirety, and the world expressed by the monad actually exists.
 Although Leibniz says that each monad is "windowless," he also claims that it functions as a
 "mirror" of the entire created universe.

(I really had no idea how to describe monads, so had to rely on Wikipedia today!)

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