What follows is a very strange idea, perhaps even an original idea, though probably not; I just don't know whose idea I'm stealing. Anyway, it should be viewed with great suspicion and certainly not taken on faith. In all probability it's just plain false, but I've thought about it till my brain hurts, and I want your brain to hurt, too.
In the traditional view of the three-dimensional world in which things change with the passage of time, the doctrine of "determinism" has gone something like this:
To a "hard" determinist, the indeterminist view just seems false on the facts. We do not directly experience freedom. At best, we experience the motion of our body parts, and the agreeable feeling of approving of that motion.
To an indeterminist, on the other hand, determinism has all the earmarks of a religious dogma. Sure, physics has accomplished a lot of cool stuff since Galileo and Newton took the stage, but did anyone ever prove that every event, down to its finest detail, happens necessarily because of the operations of the laws of physics on antecedent events? If we can't get accurate weather reports beyond a few days, what entitles us to such certainty about everything in the universe? Doesn't our admittedly vague feeling of freedom count for at least as much as scientists' spotty record of identifying causes?
So while the question "Are we free or determined?" is simple enough, the answer isn't.
At least it isn't in the aforementioned three-dimensional world of things changing in time; but what if we step out of time and take a wider perspective, looking at a four-dimensional block universe where time is on a par with space, not having a privileged direction? The laws of physics seem to have remarkably little preference for one direction of time over the other, so maybe this approach will lead us somewhere promising. One thing worth noting immediately is that there's no principled reason for supposing that causation can't work backwards. Sure, the thought induces nausea, but so does the Norwalk virus, and it's real enough, so let's not let that scare us off.
As I mentioned in another post the famous fuzziness of quantum mechanics can be made to disappear if one admits bidirectional causation. The fuzziness need not be interpreted as an inherent feature of the particle being studied, but can instead be seen as a result of the fact that a future event (e.g., an observation by the experimenter) is determining the particle's present state. If this is true, then determinism, as I stated it above, is certainly false, because it implies that causation works exclusively in one direction -- from past to future. But let's be nice, and recast the determinist doctrine in temporally neutral language:
Is this revised sort of determinism compatible with a genuine freedom? Not if genuine freedom requires that the future be "open;" i.e., not yet real, but awaiting our choices. On this view, the future is real. just not a function of the past. But if freedom requires only that our future not be fixed by our past, then, yes, it is compatible with determinism in this sense.
How does freedom fit in? Pretty nicely, I think, but with a surprising twist. We can now say that a free act -- say, shooting an arrow at an apple on one's son's head -- is (timelessly) caused by one's self-confidence as a marksman, by a threat of execution if one doesn't do it, and by the flight of the arrow. The combination of all the antecedent factors, together with all the laws of physics, are insufficient to cause the decision. The flight of the arrow is strictly required, and working backwards from that, the release of the bowstring, the drawing of the bow, etc., all of which have a perfectly respectable causal nexus, respecting the letter of the laws of physics. The act is free because at least one of its causal factors doesn't precede it.
Interestingly, the act would be no more or less free if one missed, because the subsequent causal chain of a missed shot leads back to exactly the same event -- shooting an arrow -- as the subsequent causal chain of the successful shot.
So, if any of this makes sense, we have strict causal determinism (admittedly still dogmatic, but awfully attractive for all that), and genuine freedom for agents whose acts are undetermined by antecedent conditions, not just the bogus freedom of people who aren't in jail, and all we had to pay for it was backward causation. There is still one problem to address, though: freedom, as it's characterized here, doesn't seem to let the agent say "I did what I decided to do, but I could have done otherwise." In the four-dimensional block universe, the future is (timelessly) as real and as fixed as the past, the power to do otherwise than one actually will do is illusory. However, the agent can still say "I did what I decided to do, I did it for my own reasons, and I wasn't destined to do it by past conditions." Maybe that's good enough.
There, now you take an aspirin.
In the traditional view of the three-dimensional world in which things change with the passage of time, the doctrine of "determinism" has gone something like this:
For any event e, there exist other prior events such that, given the laws of physics, e necessarily follows from those other events.and "freedom" has meant something like this:
In at least some circumstances, agents (usually people) originate their actions by their own will, uncaused by antecedent physical events; i.e., they can act as it turns out that they do, or they can act otherwise.Clearly, there is at least an apparent incompatibility between the two, and philosophers have exercised their art quite a bit on the issue. Roughly, they've gathered into three camps:
- those who insist absolutely on determinism and deny freedom;
- those who insist that we have direct experience of freedom, and that determinism must therefore be false; and
- those who argue that that the two are actually compatible, but that freedom is actually a weaker thing, consisting only in the ability to do what one voluntarily decides to do, even if that voluntary decision itself was necessarily determined by the laws of physics and the prior state of the physical universe.
To a "hard" determinist, the indeterminist view just seems false on the facts. We do not directly experience freedom. At best, we experience the motion of our body parts, and the agreeable feeling of approving of that motion.
To an indeterminist, on the other hand, determinism has all the earmarks of a religious dogma. Sure, physics has accomplished a lot of cool stuff since Galileo and Newton took the stage, but did anyone ever prove that every event, down to its finest detail, happens necessarily because of the operations of the laws of physics on antecedent events? If we can't get accurate weather reports beyond a few days, what entitles us to such certainty about everything in the universe? Doesn't our admittedly vague feeling of freedom count for at least as much as scientists' spotty record of identifying causes?
So while the question "Are we free or determined?" is simple enough, the answer isn't.
At least it isn't in the aforementioned three-dimensional world of things changing in time; but what if we step out of time and take a wider perspective, looking at a four-dimensional block universe where time is on a par with space, not having a privileged direction? The laws of physics seem to have remarkably little preference for one direction of time over the other, so maybe this approach will lead us somewhere promising. One thing worth noting immediately is that there's no principled reason for supposing that causation can't work backwards. Sure, the thought induces nausea, but so does the Norwalk virus, and it's real enough, so let's not let that scare us off.
As I mentioned in another post the famous fuzziness of quantum mechanics can be made to disappear if one admits bidirectional causation. The fuzziness need not be interpreted as an inherent feature of the particle being studied, but can instead be seen as a result of the fact that a future event (e.g., an observation by the experimenter) is determining the particle's present state. If this is true, then determinism, as I stated it above, is certainly false, because it implies that causation works exclusively in one direction -- from past to future. But let's be nice, and recast the determinist doctrine in temporally neutral language:
For any event e, there exist (in a timeless sense of that word) other events such that, given the laws of physics, e necessarily follows from those other events.Given this statement of the determinist thesis, every event still has a physical cause, but the physical cause may be a complex of other events, some earlier and some later. But this is very definitely not the determinism your mother told you about. In particular, it's not predeterminism, which is, I think, what raises the hackles of the devotees of freedom. Remember that we've now stepped outside of time; we're looking at the universe and the laws that govern it from a timeless perspective. From that perspective, it no longer makes sense to insist that causes must precede effects; in fact, that insistence is essentially identical to the insistence that time has a preferred direction, and that's just what we're denying. It will take some conceptual readjustment to get used to the idea that causes need not precede their effects, but it's not impossible. One simply needs to conceive of the cause-effect relation as a necessary one imposed by physical laws, without regard to temporal precedence -- or rather, without any presuppositions about temporal precedence. A deterministic universe in this sense is just as implacably fixed as a predeterministic universe. In our new-style deterministic universe, the "future" is as (timelessly) real as the "past." What's new is that the future not entirely determined by the past. In fact, the past is partly determined by the future, and conversely. To be quite strict, the whole lifetime of the universe -- past, present and future -- is tied up in a knot of necessary causal relations working backwards and forwards such that only one lifetime is possible.
Is this revised sort of determinism compatible with a genuine freedom? Not if genuine freedom requires that the future be "open;" i.e., not yet real, but awaiting our choices. On this view, the future is real. just not a function of the past. But if freedom requires only that our future not be fixed by our past, then, yes, it is compatible with determinism in this sense.
How does freedom fit in? Pretty nicely, I think, but with a surprising twist. We can now say that a free act -- say, shooting an arrow at an apple on one's son's head -- is (timelessly) caused by one's self-confidence as a marksman, by a threat of execution if one doesn't do it, and by the flight of the arrow. The combination of all the antecedent factors, together with all the laws of physics, are insufficient to cause the decision. The flight of the arrow is strictly required, and working backwards from that, the release of the bowstring, the drawing of the bow, etc., all of which have a perfectly respectable causal nexus, respecting the letter of the laws of physics. The act is free because at least one of its causal factors doesn't precede it.
Interestingly, the act would be no more or less free if one missed, because the subsequent causal chain of a missed shot leads back to exactly the same event -- shooting an arrow -- as the subsequent causal chain of the successful shot.
So, if any of this makes sense, we have strict causal determinism (admittedly still dogmatic, but awfully attractive for all that), and genuine freedom for agents whose acts are undetermined by antecedent conditions, not just the bogus freedom of people who aren't in jail, and all we had to pay for it was backward causation. There is still one problem to address, though: freedom, as it's characterized here, doesn't seem to let the agent say "I did what I decided to do, but I could have done otherwise." In the four-dimensional block universe, the future is (timelessly) as real and as fixed as the past, the power to do otherwise than one actually will do is illusory. However, the agent can still say "I did what I decided to do, I did it for my own reasons, and I wasn't destined to do it by past conditions." Maybe that's good enough.
There, now you take an aspirin.