Personally, I don't think it matters. We should still act like we have free will, like free will exists, or we'll be excusing whatever someone does. I've always said that whether free will exists, the only way to act is as though it does. Nothing's gained by believing that free will doesn't exist. That's my view on it anyway, but I would like to hear what other people have to say about morality and all that stuff if they think there isn't free will.