[Brandon]

If the claims of the determinists are correct, we'd enter into a serious philosophical problem: responsibility. If you can't freely choose your actions, you cannot be held fully responsible for them. What then, would we do with our justice system?

On a side note, William James, the pragmatist, suggested we accept free will because it "works better." We feel comfortable with the idea that we have options and that people can be held responsible for what they do.