Monday, August 02, 2010

your move: the limits of free will

NYTimes | You may have heard of determinism, the theory that absolutely everything that happens is causally determined to happen exactly as it does by what has already gone before — right back to the beginning of the universe. You may also believe that determinism is true. (You may also know, contrary to popular opinion, that current science gives us no more reason to think that determinism is false than that determinism is true.) In that case, standing on the steps of the store, it may cross your mind that in five minutes’ time you’ll be able to look back on the situation you’re in now and say truly, of what you will by then have done, “Well, it was determined that I should do that.” But even if you do fervently believe this, it doesn’t seem to be able to touch your sense that you’re absolutely morally responsible for what you next.

The case of the Oxfam box, which I have used before to illustrate this problem, is relatively dramatic, but choices of this type are common. They occur frequently in our everyday lives, and they seem to prove beyond a doubt that we are free and ultimately morally responsible for what we do. There is, however, an argument, which I call the Basic Argument, which appears to show that we can never be ultimately morally responsible for our actions. According to the Basic Argument, it makes no difference whether determinism is true or false. We can’t be ultimately morally responsible either way.

The argument goes like this.

(1) You do what you do — in the circumstances in which you find yourself—because of the way you then are.

(2) So if you’re going to be ultimately responsible for what you do, you’re going to have to be ultimately responsible for the way you are — at least in certain mental respects.

(3) But you can’t be ultimately responsible for the way you are in any respect at all.

(4) So you can’t be ultimately responsible for what you do.

The key move is (3). Why can’t you be ultimately responsible for the way you are in any respect at all? In answer, consider an expanded version of the argument.

(a) It’s undeniable that the way you are initially is a result of your genetic inheritance and early experience.

(b) It’s undeniable that these are things for which you can’t be held to be in any way responsible (morally or otherwise).

(c) But you can’t at any later stage of life hope to acquire true or ultimate moral responsibility for the way you are by trying to change the way you already are as a result of genetic inheritance and previous experience.

(d) Why not? Because both the particular ways in which you try to change yourself, and the amount of success you have when trying to change yourself, will be determined by how you already are as a result of your genetic inheritance and previous experience.

(e) And any further changes that you may become able to bring about after you have brought about certain initial changes will in turn be determined, via the initial changes, by your genetic inheritance and previous experience.

There may be all sorts of other factors affecting and changing you. Determinism may be false: some changes in the way you are may come about as a result of the influence of indeterministic or random factors. But you obviously can’t be responsible for the effects of any random factors, so they can’t help you to become ultimately morally responsible for how you are.

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