I've recently written a new essay which I have posted here in the essay section of the website. Please read it and see what you think. Post any comments to it here. Here is the abstract to the essay:

Abstract: This essay sets out to dispel the myth that the soul can be the originator for free will. I will start the essay by establishing the Cartesian idea of what the body is and showing that Descartes and modern biology indicate that the body is a biological machine. After indicating how Descartes (and others) use the soul as the originator for free will / volition, I will show that in order for the soul to be labelled and identified as a soul, it must have the format and properties of a soul. These must be adhered to in order to designate the soul with coherent and consistent properties. To conclude, I will maintain that if a soul must adhere to rules and laws to remain being a soul, then it must operate within a deterministic framework.