On free will

This sums up the argument against free will quite nicely:

The problem of free will, of course, is that we understand that we are physical entities: specifically, the brain is the physical basis of mind, and the brain, as a physical system, is not exempt from the physical laws that determine everything else that goes on in the universe; neither are our thoughts and actions exempt. So the problem of free will is simply this: how do we reconcile our conscious experience of freedom of the will with the sheer and simple fact that we are physical entities existing in a universe that consists of particles acting in fields of force?

The rest of the article is interesting as well.