Before we begin, consider a particular moment from your own life. Not the phone call, not the run — those were last episode, and those more or less ran themselves. Something harder this time.
A real decision. The kind you stood at the edge of for a long time. Whether to leave — a job, a city, a person you had built a life around. Or whether to say the true thing out loud, the thing that was going to cost you, in a room where the easy thing was available and no one would have blamed you for taking it. The kind of choice where you did not know, going in, which way you would come out. You weighed it. You lay awake over it. There were real reasons on both sides, and none of them heavy enough to settle the matter for you.
And then, at some point, you chose. You came down on one side. What matters here is not which side you chose, but how it felt to be the one choosing. It did not feel like the stronger craving winning. It did not feel like a sum being added up somewhere behind your eyes and producing an answer. It felt as though you — the whole of you, standing at the fork — decided which way it would go. You took one path and left the other genuinely available, the path you could have taken instead. It felt as though the future had two possible branches, both of them real, and you were the thing that determined which one happened.
That feeling has a name in philosophy, though no one having it calls it that at the time. It is the sense of being the author of the choice — not a link in a sequence of causes, but the point at which the sequence begins. The origin. The one place in the whole causal history of the universe where something genuinely new entered, and it entered through you.
This is Philosophy for Us — philosophy for everyone, no degree required. Choice and Blame, episode four of eight.
Last time we built the most reassuring case in the series so far: the compatibilist's. He looked at the determinist's picture — every choice caused, nothing in you that starts itself — and built freedom anyway. Freedom, he said, was never the absence of causes; it is whether the desire that moves you is one you would endorse — the difference you noticed last week between the run and the phone. And then he did something bolder than it first sounds. He granted the determinist that you could not have done otherwise, and argued that you are responsible all the same — because responsibility never depended on the road being open; it depended on whether the thing that moved you was your own, and would have responded to reasons. We built that as strongly as it goes. Many thoughtful people stop there, satisfied.
But perhaps you did not. Perhaps somewhere in it a part of you resisted. When determined Jones could not escape — every alternative closed off, and the compatibilist saying it makes no difference, hold him responsible anyway — perhaps a part of you refused. That is too much to give away, it said. When I stood at my own fork, the other path was really open. I could really have taken it. And I will not sign that away for a tidier definition, whatever calm the tidier definition brings.
Tonight is for that objection. Tonight we meet the philosophers who refuse to give the could-have-done-otherwise back — who say the feeling we began with is not a flattering story but an accurate report: you are the author, the future really was open, and you really were the thing that settled it. They are called libertarians. Let me clear up one confusion at once: this has nothing to do with the politics of the same name. It is an old and poorly chosen label for a position about free will. Libertarians hold that the compatibilist bought his peace too cheaply, by giving away the one thing that mattered.
So we give them what we gave the determinist and the addict before them — the strongest version their own defenders would recognise. And then we find out what it costs.
Start with what the libertarian is refusing, because the refusal is the core of the view.
Return to the picture of causes from two episodes ago. Every event is caused by the one before it, running back and back: your choice tonight caused by the state of your brain a moment earlier, caused by your day, your history, your body chemistry, your genes, the whole long story reaching back to the beginning. The determinist looks at that sequence and says you are one event in it, no different in kind from any other, produced by what came before and producing what comes after. The compatibilist looks at the same sequence and says: granted, you are one event in it, but you can still be free in the way that matters. The libertarian looks at it and says the one thing neither of the others will say. The sequence of causes does not simply pass through me. Somewhere, it begins in me.
That is the core, and everything else tonight is the work of giving that claim a definite meaning. The libertarian holds that when you make a real choice — not a reflex, not a craving, but a deliberated choice like the one you recalled at the start — you are not merely passing along a push you received from behind. You are beginning something. The responsibility is not handed to you by your upbringing and your chemistry and passed onward. It originates in you, because you are the point at which this particular part of the future was settled, and nothing behind you settled it for you.
Now the determinist asks the obvious question, and asks it hard. That is a compelling feeling, but what could it actually mean? Everything has a cause. You are made of atoms; atoms obey physics; and physics has no place for a person stepping in and starting a wholly new sequence from nothing. Where, in that picture, is there room for a cause that starts itself?
The most uncompromising answer comes from the philosopher Timothy O'Connor, in his book Persons and Causes, published in 2000; he is developing an idea the philosopher Roderick Chisholm had put sharply a generation earlier, in a 1964 lecture called "Human Freedom and the Self." It is the boldest claim you will hear tonight, so I will state it plainly.
O'Connor says the determinist has assumed something without noticing, and the assumption is doing all the work. He has assumed there is only one kind of causation: an event causing an event. One billiard ball strikes another and sends it off. The state of my brain at one moment causes its state the next. Event producing event, all the way down — that is the only causation the determinist's picture contains. O'Connor argues there is a second kind, an older notion, and that a person is an instance of it. Not an event causing an event, but a substance — a thing, a persisting agent — directly causing an effect without itself being caused to do so. He calls it agent causation. You, the enduring thing you are, cause the choice. There is no prior event that made you cause it, because it was not an event that did the causing. It was you, and you are not an event; you are an agent. So the determinist's decisive question — what caused you to cause it? — is, on O'Connor's account, a mistake about categories. It tries to push the agent back into the line of events and demand a cause from behind. But an agent is precisely the thing that is not one more event awaiting its push. The agent is where the causing begins.
And this is less strange than the determinist makes it sound, because we already speak this way much of the time. Ask why the window broke: a rock struck it. That is an event. Ask why the rock was moving: a boy threw it. What has just been said is not "a sequence of muscle contractions propelled the rock," but the boy threw it. We mean the boy — the person, the originator, not a system of firing neurons he happened to be housed in. We speak like this constantly. We hold people responsible, not their brain-states; we thank people and resent people. O'Connor's claim is that this is not loose talk we would tidy up if we became more scientific. It reflects something real. The boy is where the throw originated. Responsibility originates in the boy. Persons, on this view, are the one kind of thing in the universe that can genuinely begin a sequence of causes.
Hold onto that, because this is the only one of our three views that tells you the feeling you began with was accurate. The determinist called it an illusion: you felt like an author, but you were one event among others. The compatibilist told you to stop wanting it: be free in a smaller, safer sense and give up reaching for origination. The libertarian alone says you felt it because it is real. The future branched, and you — not merely your atoms, you — were the cause that selected the branch.
But there is one difficulty to keep in mind before we go on, because we will need it later. Everything O'Connor builds rests on one word: the agent. The persisting thing you are, the substance that lasts from the beginning of the deliberation to its end and does the causing. And here is the trouble. When philosophers go looking for exactly that — the self that persists through time, the thing that is genuinely the same in the man across the table tonight and the boy he was thirty years ago — the search tends to come back empty. There is no inner recorder behind the eyes, no further fact underneath the changing succession of experiences: only the experiences themselves, one after another, with no additional self seated behind them. Agent causation needs that missing self to be present and definite — a single, persisting originator, real enough to serve as a cause. So keep watching, through the whole episode, for whether that thing is actually there. The libertarian needs an author. And philosophers have searched for that author before, and come back empty-handed.
For now, though: on this view you are an originator. The future branches, and the choice originates in you. Of our three, the libertarian is the only one who returns that feeling to you intact.
Perhaps agent causation persuades you. Perhaps the idea of a person as a genuine originator — a substance that causes without being caused — rings true as soon as you hear it. But perhaps it does not. Perhaps when O'Connor says the agent causes the choice and nothing causes the agent to, a determinist voice answers: that is not an explanation; that is the point at which you stopped explaining and named the gap instead. You have named the mystery and given it a dignified label — agent causation — two solemn words offered in place of the explanation the determinist asked for.
If that is where you have landed, there is a second libertarian who works quite differently. His name is Robert Kane, and in his book The Significance of Free Will, published in 1996, he sets himself the hardest task in the field: to build genuine, undetermined free will out of nothing exotic — no uncaused substances, no breaks in physics, nothing the scientist from two episodes ago does not already accept. Only the ordinary natural world, and one feature of it the scientist will grant him.
Here is his argument. Most of what we do, Kane says, is not free in the deep sense and does not need to be. We act from a character already formed, reasons already weighted, habits already worn in: you reach for the coffee, you take the usual road home, and that is all caused, and all fine. But occasionally, a few times in a life, we reach a moment he calls a self-forming action. A moment in which we are genuinely torn — wanting two incompatible things, with real and weighty reasons for each, and the reasons do not settle it. And crucially, the person who would settle it is not yet fixed, because the person is exactly what this choice is about to form. The safe career against the risky calling. The loyalty that is slowly destroying you against the honesty that would overturn your life. You are pulled hard in both directions, and there is no fact about who you already are that decides it — because who you are is precisely what is in question.
Here is the part that makes it libertarian. In that torn moment, Kane says, the process in your brain is genuinely undetermined. The tension is not merely a feeling; it is real, and it reaches all the way down. Your will is making an effort toward both options at once, and the outcome is not fixed in advance by the prior state of the world. It could genuinely go either way. And when it finally resolves — when you come down on the calling, or come down on the truth — that resolution is a self-forming action. You did not have a finished character that produced a determined result. You had a divided will in a genuinely open moment, and the act of choosing formed the character. You made yourself, at that moment, within the indeterminacy.
Kane keeps what O'Connor had to spend. He needs no substance standing outside the order of causes. He need not suspend physics or place an uncaused soul behind your eyes. He needs one thing only: that the world, at the crucial moments, is genuinely undetermined — not yet settled. And that, as it happens, is what the physics of very small things has reported for a hundred years. At the smallest scale, the world does seem to leave some outcomes genuinely open until they occur. Kane locates your freedom in that one genuine gap. The future branches because the world itself has not yet settled which branch is real — and you, the effort, are what tips it.
There is even a third way to be a libertarian, which I will only point to, so you know it is in the room. A few philosophers — Carl Ginet and Stewart Goetz are the names — hold that the free act is not caused by anything at all. Not by an agent, as O'Connor says, and not by a torn effort, as Kane says. The choice, they argue, is simply an uncaused event with a certain agent-like quality built into it: the freedom is in the doing, and needs no cause behind it. It is the hardest of the three to pin down, and we will not work through it tonight, but note it: the libertarian position has at least three serious versions, not one. This is not a fringe with a single eccentric. It is a live and defended body of work.
So take the two strong versions in turn. O'Connor: you are a substance that originates the choice; responsibility begins in the agent. Kane: you are an effort in a genuinely open moment, and the choice forms the self. The machinery is entirely different, but the core claim is the same. Both say the future was really, in the deepest sense, open. Both say you were really the one who settled it. Both say the feeling you came in with — I decided which branch happened — was not a comforting story but an accurate report of the one moment in the universe where the sequence of causes began in you.
Of the three views, the libertarian's is the only one that returns your authorship whole. The determinist called it an illusion. The compatibilist exchanged it for a smaller, safer freedom. The libertarian gives it back entire: you are not one event pushed from behind; you are an origin.
Which is why the objection it faces is the most difficult of the three. It does not arrive from outside, the way the determinist's sequence of causes did. It grows out of the very feature that made the view attractive — the openness itself. The libertarian needed the moment to be genuinely open. And that openness is about to become his deepest problem.
Here is the objection. Philosophers call it the luck objection, or simply the problem for libertarianism, and its difficulty is that once you have seen it you cannot stop seeing it.
Return to your torn moment — the real one from the start of tonight, the fork with two open paths. The libertarian's whole claim is that the moment was genuinely open: nothing in the prior state of the world, nothing about who you already were, settled which way you would go. The future had two live branches, and neither was fixed until you, in the moment, made one of them real.
Grant it. Hold that fixed, and ask one small question. What made it go the way it went?
Now see how the objection comes at him from both sides at once. Suppose something did make it go that way — your strongest reason, your deepest values, the settled weight of the person you had become. Then the choice was determined by that thing, and we are back in the sequence of causes, back in the determinist's world, and the openness was never real. So the libertarian cannot say that. He needs the openness to be genuine. That forces him to the other side: nothing made it go that way. It was undetermined, full stop. Now follow that word to its end. If nothing made your choice come down on the calling rather than the safe road — not your reasons, not your character, nothing at all — then in what sense did you do it? An outcome that nothing determined is an outcome that nothing controlled, and "nothing" includes you. Rewind the universe to one second before you chose — the same brain, the same reasons, the same you, down to the last atom — and let it run again. The libertarian says it could come out the other way. But if it could come out the other way with nothing whatever different to account for the difference, then what tips it is not you. It is chance. The choice would be no more yours than the fall of a die, and no one earns praise or blame for the fall of a die, whoever's it is.
That is the objection. And notice its shape, because it is the same shape as every difficulty we have found so far. The determinist relied on a move he had not earned, sliding from "caused" to "unfree" as though the two were one word — and we watched them come apart. The compatibilist could not close the gap between being answerable and deserving blame. The libertarian has this: he needs the choice to be undetermined, so that it is genuinely free, and he needs it to be yours, so that it is genuinely blameable — and the harder he insists on the first, the more the second gives way. "Undetermined" and "up to you" look at first like the same thing and end up pulling in opposite directions. The very openness that was meant to make you the author is now threatening to show that the choice was no one's doing at all.
And it hits both our libertarians, though not equally. Kane is the more exposed, because he stated the difficult part openly: he told you the torn moment is genuinely undetermined, the outcome not fixed in advance. So rewind his self-forming action. By his own account it could land the other way, and there is no prior fact to say why this run gave you the calling and that run gave you the safe road — only two ways the indeterminacy happened to fall. Kane has replies, and they are not foolish. He says you make the effort either way; you would own and stand behind whichever result came; you had real reasons for both, so it is not random in the way a coin is random. But the worry does not go away. Standing behind a result after it lands is not the same as having controlled which result landed, and the control was supposed to be the whole point.
O'Connor sees the objection coming and tries to get past it, and here he deserves a fair hearing, because this is the most serious reply the view has. He says you are only trapped if you assume there are just two options: either a prior event settled the choice, which is determinism, or nothing settled it, which is chance. Agent causation, he says, is a third option, and this is the entire reason it exists. The agent settled it — not a prior event, so it is not determinism; but not nothing either, so it is not chance. The agent, the persisting substance, was the settling of it. And when you press further — what made the agent settle it this way rather than the other? — O'Connor says you have brought the sequence of causes back in. You are demanding that the agent's originating be itself caused by some prior event, which is to insist that it is really event-causation after all, which is to refuse to take agent causation seriously as the different thing it claims to be. To be an originator, he says, just is to be able to settle something without anything else settling it for you.
Is that a genuine answer, or the same mystery under a more respectable name? That is the honest question, and I am not going to manufacture a verdict on it, because there is not one to be had. The critics say O'Connor has only relabelled the luck: if there is truly no fact at all about why the agent originated this rather than that, then calling the agent "the cause" adds no control; it sets a more dignified word on top of the same chance. And notice what O'Connor's reply must lean on to work at all: that persisting agent-substance, the enduring originator — the thing we flagged at the start of tonight that philosophers go looking for and tend not to find. The defenders say that objection assumes what it needs to prove — that it keeps holding agent causation to the standard of event-causation, which is exactly the framework agent causation was built to reject. And here is where the matter actually stands. That argument is live. Serious philosophers are having it, in print, right now, and it is nowhere near settled. The luck objection did not destroy agent causation. It opened a real question at the centre of the view that the view has not closed — and the view has not conceded.
But I am not going to run the objection for you, because running it is yours to do, not mine. Take the choice you recalled at the start — the real one, the torn one, the one you were sure was yours. You want to say: I made that. Good. Now turn the libertarian's own question on it. Was it settled by who you already were — your deepest reasons, your formed character? If so, it was not open, and you have just become a determinist about your own finest hour. Or was it genuinely open — could the rewound you, atom for atom, have gone the other way, with nothing to account for the difference? Then you owe yourself an answer to the question we have been walking toward all along: what makes that choice yours rather than a matter of chance? Do not reach for the answer yet. The thing you were most certain of — I did that; whatever else is true, that one was me — gives way the moment you ask it to be both genuinely free and genuinely yours at once. That is what the libertarian's own question leaves in your hands. The libertarian promised to give you back the author. And you have just felt the author begin to slip — into something moved from behind, if the choice was settled in advance, or into a matter of chance, if it was not.
So take stock of where the three episodes have brought you, because tonight you completed the set.
Three episodes. Three answers to the single metaphysical question we began from: could you have done otherwise, really? You have now built all three at full strength, with your own hands, and felt each one fail you in its own way.
The determinist said no. You are one event in a sequence of causes, caused all the way down, with no point in you where you break in and start something new. Honest, austere, hard to shake off — and you watched it rely on a move it never earned, sliding from "caused" to "unfree" as though those were two names for one thing, until the two words came apart.
The compatibilist said stop asking. Whether the road was open was never the point; ask instead whether the choice was yours — your reasons, a mechanism that would have responded to them. Reassuring, and genuinely strong — and it secured less than your blame was reaching for, because it delivered answerable and never reached deserving.
And tonight the libertarian said yes. Really yes: the road was open, you closed it, and you are the author the other two could not return to you. It is the only one of the three that gives the whole of it back. And the openness it needed to make you free turned out to be the same openness that threatens to make your most deliberate choice a matter of chance you do not own.
Three answers. And you wanted — you came in wanting, badly — one of them to win. Because if one of them won, you would finally know. Whether the man across the table could have done otherwise. Whether your anger at him is just or cruel. Whether the blame you read back to yourself in the small hours is telling you the truth or a lie. You wanted the metaphysics settled so that you would finally know how much of the blame is deserved. And here is where the night leaves you: it is not going to be settled. Not because we ran out of time, but because the three best answers our species has produced are all still standing, all damaged, and not one of them has refuted the other two. You have looked — harder than most people ever look — straight at the thing your whole moral life is balanced on, could they have done otherwise, and the honest finding is that no one knows, and the people who have given their lives to the question cannot make it come out.
That is the finding, and it is a hard place to stand. But do not let it settle into the easy thought, because the easy thought is right there, and it is a false comfort. The easy thought is to shrug: if the ablest people who ever lived cannot settle it, then it cannot really matter — who can know — do what feels right. That is comfortable, and it lets you off neatly. And it is false — the most tempting falsehood of them all — because the fact that you cannot settle it does not make the question matter less. It makes it matter more. You are going to walk out of tonight and blame someone — or lie awake blaming yourself — tomorrow, and the day after, and every day for the rest of your life. The man is still across the table, and the blame is still in your hands, whatever the metaphysics does or fails to do. And you have just shown yourself, past your own ability to wriggle out of it, that the premise the whole thing rests on is one you can neither establish nor dismiss. You cannot show he could have done otherwise. You cannot show he could not. And you have to blame, or not, all the same.
We have reached an impasse. Three routes, and every one runs into it. And this is where it would be easy to stop — the great mystery, no one knows, how humbling, how deep — and let you leave with the warm sense of having brushed against something profound. We are not stopping here, because stopping here would be its own kind of falsehood. It would leave you believing that the question we have just failed to answer is the only question that matters.
It is not. Go back to the first night, when we took one thing you had carried your whole life and divided it in two: is it true, and what is my blame for. We have now spent three hard episodes on the first of those questions, and we have run into the impasse. Which leaves the second — the one we set aside that first night — still standing, untouched, while we were occupied with the first. So next time, someone does what none of our three thought to do. He does not try to force his way past the impasse. He stops, turns around, and asks why we were ever so sure this was the only thing standing between us and knowing what to do. His name comes next time. He does not answer the question the three of them could not answer. He declines it, and asks a different one.
For tonight, carry one thing with you. Sometime this week you will catch yourself certain — genuinely, righteously certain — that someone could have done otherwise, or equally certain that they could not. When that happens, stop, and try to say which of three things you mean, and on whose authority you mean it. The author who begins the sequence. The mechanism that would have responded to reasons. The event that could not have gone otherwise than it did. You have now built all three. You have seen what each one costs so far. And you know that the one you will reach for — whichever it is — is the one you cannot prove. That is not a smaller place than the one you began in tonight. It is a harder one. You came in able to blame without thinking. You cannot any more. The metaphysics will not settle, and you still have to decide, tomorrow, what to do with the blame in your hands.
That is where we are. Three answers, no winner, and the question still yours.
Thanks for listening. I'll see you next time.