You, and everyone else!Fist and Faith wrote:. . . I believe I can feel my own free will.

So if everyone can feel their (alleged) freewill, then this feeling must be a kind of "necessary illusion," something that we have all evolved to experience. But what possible evolutionary mechanism could exert selective pressure on illusions within our consciousness? How could this illusion possibly affect our survival or the passing of genes to the next generation? If we don't really have freewill, then this means our actions are lawful and axiomatic. In other words, our actions would require no input whatsoever from our will, and would be exactly the same without this additional illusion.
So it seems impossible that natural selection could ever have gained a "foothold" on the mental mechanisms which produce this universal illusion (universal among humans). If the actions of a person would be the same whether he had this illusion or not, then there would be no way for nature to "select" between the two cases. There's no reason these types of people would so successfully out-compete the varieties without this illusion.
Therefore, from a purely evolutionary perspective, the illusion of freewill would have to confer a survival advantage. Which means a person's actions *are* different (e.g. better for their survival) when they have this additional illusion.
But now we're left with the conclusion that illusory experiences can actually confer advantages in the real world, and change a person's actions to more accurately navigate the survival factors of their environment. That's a very strange illusion! It makes a person's actions seem purposeful, intentional, and freely chosen--even though they're not--and yet doing so somehow alters their actions for the better.
In what way would a person's chances for survival be increased for them to believe falsely that they are in control of their actions? I don't think that idea makes much sense. I think that given the fact that our experience seems free, the burden of proof should rest on those who disagree. They should provide an evolutionary mechanism to show how natural selection could have shaped us to experience this illusion.
On the other hand, I can think of many ways that the reality of freewill would confer survival advantage. A being who is free, and knows it, is the best sort of "generalist," an animal which can adapt to the greatest variety of environments. It does not have to rely upon instinct or habit, but can deal with novelty in ways that other animals cannot. Even intelligence would not be enough to adapt like we have, if we were not free to try new techniques and strategies, if we didn't purposely push beyond the limits given to us in our environment.