Firstly, let us note that the linguistic expression "free will" disguises a rhetorical trick: the amalgamation of two concepts, "freedom" and "will", whose belonging-together has been so thoroughly enmeshed in our consciousness — through the use of this very expression — that we seldom question it. But make no mistake: "freedom" and "will" are originally two distinct concepts, which have only later been unified in this chimera. Therefore, we will begin our discussion by analytically separating freedom from will, and proceed to discuss them apart.
Freedom, in turn, can be separated again into two sub-concepts. I will call them, respectively, freedom from influence and modal freedom. Freedom from influence is the freedom from — well, why not — external factors that impinge upon man from the world around him — it is the sense in which the master is "free", and the slave is not. Freedom from influence should be a rather straightforward concept in relation to our discussion, although it of course raises a torrent of questions on its own, mainly in regard to political theory.
Modal freedom, on the other hand, is something much more nebulous. It relates to the tension between the possible and the actual, between the indicative and the subjunctive (thus "modal"). It is the extent to which things could have been different — more precisely, the extent to which you could have acted differently. It is the basis of choice (a person doing something is said to have chosen to do this if and only if he could have acted differently), and choice, in turn, is the basis for all moral reasoning (a person is morally responsible for his actions if and only if he chose to act in that way, and to act morally is to make moral choices). It seems safe to assume that when people speak of "free will", this is the kind of freedom they have in mind.
The concept of modal freedom is tricky, of course, because we have no clear understanding of what it means that something "could have been different". Indeed, a materialist determinist would hold that since everything in the universe is subjected to causal, physical laws, which allow for only one effect for each possible cause, nothing could ever "have been different" and choice is ultimately an illusion. One problem with determining whether something "could have been different" is, of course, that we have no positive way of determining whether things could, indeed, have been different. We cannot inspect actual reality in order to determine the nature of the possible realities we have forfeited in the course of making this particular actuality actual. But we do have the concepts of possibility and actuality. It is reasonable to assume that they correspond to some aspect of human existence, or otherwise it is hard to see how we could have come up with them to begin with.
However, our purpose here is not to solve once and for all the riddle of freedom, but only to analyze the concept of "free will". Let us, therefore, content ourselves with the above sketch of freedom for nonce, and turn to the other concept, will. The philosopher that have, above all others, given will a mustache-adorned face is of course Friedrich Nietzsche. To Nietzsche, everything is will. Knowledge is will. Morals are will. Truth is will. And it is not any old kind of will, but the will to power.
The relationship Nietzsche establishes between will and freedom is interesting to discuss, because it flies in the face of the dogma implicit in the phrase "free will". According to Nietzsche, will is everything but free — if we understand "free" according to the concept of modal freedom. Indeed, the idea that a person might act differently than how his will impels him, Nietzsche views as a philosophical mystification. He writes thus in "On the Genealogy of Morals":
To demand of strength that it shall not appear as strength, that it shall not be a will to conquer, to subjugate, to make itself master over others, that it shall not be a longing for enemies, opposition, triumph — this is as unreasonable as to demand of weakness that it shall appear as strength. A certain quantity of strength is an exactly equivalent amount of drive, will, action — more correctly, it is nothing but this drive, will, desire for action. And only through language's seduction (and the fundamental delusions of our reason, petrified in language), which conceives and misconceives of all action as conditioned by an actor, a "subject", can it look like if it were different. For in the same way that people distinguish the lightning from the thundering, and conceives of the latter as an action, the action of a subject called "the lightning", so popular morals distinguish strength from the manifestations of strength, as if there were, behind the strong, a substrate with the freedom to manifest itself as strength or not to. But there is no such substrate; there is no "being" behind the action, the practice, the becoming. (Translated from my Swedish edition of "On the Genealogy of Morals", Om moralens härstamning, 1965, pp 46 f.)
I am willing to buy Nietzsche's point here, at least partially. When someone has a will (i e, a desires something, wants something), and is strong enough to see his will through (i e, "free" in the sense of "freedom from influence")... in what way could he have "acted differently"? How is it meaningful to talk of someone wanting to do something, and having the means to do so, and still not do it? If we were confronted with such a person, we would justly wonder, did he want to do it? And we would start to suspect that maybe he wasn't so sure what he wanted.
Following this line of thought, however, we quickly run into problems, because we have no difficulty imagining a situation where we might want to do something and be able to do it, and still not do it, perhaps because conscience got the better of us or because we worried about the consequences, or what have you. It is possible to meet these problems by saying, "well, if your conscience got in the way, then you really wanted to be a nice guy more than you wanted to do whatever it was that you were thinking about", or "well, if you worried about the consequences then maybe you weren't as free from influence as you thought"... but these objections tend soon to become mere wordplay. How far can you move from the normal use of words like "wanted to" and "able to" before your words lose all meaning?
Still, we have to agree with Nietzsche that whatever it is that is free, it ain't will. Will is directed towards some definite purpose. Will compels, and the stronger you want something, the less likely you are to "choose differently". We must therefore reject the standard association of freedom and will. Freedom, in so far as it exists at all, stands in an opposite relationship to will. If anything is free, it is rather undecidedness. We become aware of our freedom when we don't really know what we want. Freedom confronts us, not in will, but in anxiety — what the Germans call Angst and we Swedes denote by the delightful word ångest.
Anxiety confronts us most acutely when we have to make a hard choice and do not know which alternative to choose. There might be several reasons for this difficulty. The choice might be between moral principles and pragmatic gain, for instance. Or it might simply be a gamble, made against scant background knowledge. The first possibility might certainly give us a clue to the relationship between freedom and morality. The second possibility highlights the fundamental role of ignorance in the dynamics of freedom. Basically, the more we know, the surer we are. This idea, taken to its logical conclusion, leads to a possible account of the "could have been different" that haunted us in the above discussion — that things "could have been different" only in so far as we are ignorant of the fact that, no, they really couldn't. This account gives ignorance a constitutive role in the phenomenon of human freedom, which might seem rather depressing for some.
