3.1.2 - Libertarianism, hard determinism and compatibilism
If every choice has prior causes, can anyone still deserve praise or blame? Libertarian agent-causation, illustrated by Roderick Chisholm, protects the possibility of choosing otherwise; hard determinism denies ultimate freedom; David Hume's compatibilism identifies freedom with acting from one's will without coercion. We will explain these competing positions and evaluate whether responsibility requires uncaused choice or only voluntary agency.
What Extent Means
Moral responsibility is about whether a moral agent can properly be praised or blamed for an act or omission. AQA links it with free will because praise and blame seem unfair if the agent had no real control.
The word extent matters. This lesson is not just asking whether responsibility exists. It asks how far responsibility reaches once we think seriously about causes, choices, character and constraint.
Moral responsibility
The status of being morally answerable for an action or omission, so that praise, blame, reward or punishment may be deserved.
The three positions give different answers.
| Position | Core claim | Extent of responsibility |
|---|---|---|
| Libertarianism | Human beings can make genuinely free choices; determinism is not the whole story. | Responsibility can be strong, because agents could have chosen otherwise. |
| Hard determinism | All choices and actions are causally determined; free will is an illusion. | Responsibility as desert is denied or greatly reduced. |
| Compatibilism | Determinism and meaningful freedom can fit together. | Responsibility is possible when the action flows from the agent rather than from coercion or compulsion. |
Do not confuse metaphysical libertarianism with a political view about the state. In this topic, libertarianism means a view about free agency and moral responsibility.
Libertarianism
Libertarianism is an incompatibilist position. It says free will and determinism cannot both be true in the way moral responsibility requires. If every choice is fixed by earlier causes, the agent is not truly responsible in the fullest sense. Therefore, libertarianism defends genuine free choice by denying that human action is wholly determined.
The libertarian argument usually turns on two ideas.
| Libertarian idea | Meaning for moral responsibility |
|---|---|
| Alternative possibilities | The agent could have chosen otherwise in the relevant situation. |
| Sourcehood | The action comes from the agent as a real source, not merely from a chain of prior causes outside the agent's control. |
This gives a clear argument chain:
- Moral responsibility requires real control.
- Real control requires more than being pushed along by prior causes.
- In some choices, the agent can genuinely choose between alternatives.
- Therefore, the agent can deserve praise or blame for what they choose.
Roderick Chisholm is often used as a supporting example of agent-causation: the idea that a free action is caused by the agent, not just by earlier events happening inside or outside the agent. You do not need to treat Chisholm as an AQA-required named scholar here, but the idea helps explain why libertarianism is more than "I feel free". It is a claim about the agent being a genuine originator of action.
The strength of libertarianism is that it protects ordinary moral language. If a person knowingly lies when they could have told the truth, it makes sense to say they are blameworthy. The pressure point is that libertarian freedom must avoid becoming random. If a choice is not determined by prior causes, critics ask what makes it the agent's responsible choice rather than a matter of luck.
Hard Determinism
Hard determinism is also incompatibilist, but it moves in the opposite direction from libertarianism. It agrees that free will and determinism cannot both be true. It then argues that determinism is true, so free will is not.
Determinism
The view that events, including human choices and actions, are fixed by prior causes and conditions.
A hard determinist does not merely say that upbringing, biology or social pressure influence people. Almost everyone accepts that influences matter. Hard determinism makes the stronger claim that choices are causally fixed by earlier conditions, so the experience of choosing freely is misleading.
| Hard determinist move | Effect on responsibility |
|---|---|
| Human choices have causes before the moment of choice. | The agent is not an uncaused source of action. |
| Given the exact same past and laws of nature, the agent could not do otherwise. | The ordinary basis for blame is weakened. |
| Praise and blame may still shape behaviour. | They may be useful, but not deserved in the libertarian sense. |
The most important distinction is between causal responsibility and moral responsibility. A person may causally bring about an outcome: their hand signs the document, their words hurt someone, their action starts a chain of events. The hard determinist asks whether that person ultimately deserves blame if the whole action was produced by causes they did not choose.
This position can seem humane because it encourages attention to causes: trauma, social conditions, addiction, fear or ignorance may matter when judging conduct. But it also creates a serious AO2 problem. If nobody is truly responsible, then ordinary ideas of guilt, justice, repentance and deserved praise seem difficult to preserve.
Hard determinism does not deny that actions happen through people; it denies that people are ultimately free enough to deserve praise or blame in the usual sense.
Compatibilism
Compatibilism tries to avoid the stark choice between libertarianism and hard determinism. It accepts that human actions may be causally shaped, but argues that this need not destroy free will or moral responsibility.
David Hume gives a classic compatibilist route. In An Enquiry Concerning Human Understanding, he connects actions with motives, character and circumstances, but still treats liberty as acting according to one's will rather than being externally constrained. On this view, freedom does not require escaping all causation. It requires that the action expresses the agent's own will.
| Compatibilist question | Why it matters |
|---|---|
| Did the agent act according to their own wishes, reasons or character? | If yes, the action may be free in the relevant sense. |
| Was the agent coerced, forced, manipulated or under compulsion? | If yes, responsibility may be reduced. |
| Could the agent have acted differently if they had chosen or wanted differently? | This gives a conditional sense of "could have done otherwise". |
This explains why compatibilists often distinguish causation from constraint. Suppose someone tells the truth because they value honesty. Their action may have causes: upbringing, habits, beliefs and character. But the compatibilist says those causes do not automatically remove responsibility, because the action still flows from the person. By contrast, if someone lies because they are threatened with immediate serious harm, the action is constrained and responsibility is reduced.
The strength of compatibilism is practical: it fits much of ordinary moral judgement. We already consider motives, pressure, knowledge and character when deciding how responsible someone is. The objection is that compatibilism may redefine freedom too weakly. If the person's wishes and character were themselves determined by causes beyond their control, critics ask whether acting from those wishes is enough for real responsibility.
Comparing Responsibility
The three views are easiest to compare by asking what each one does with the same case.
Imagine that a student deliberately plagiarises an essay. They understand the rule, know it is wrong, and are not being threatened. How far are they morally responsible?
| View | Likely judgement | Reasoning |
|---|---|---|
| Libertarianism | Strongly responsible. | The student could have chosen otherwise, so blame is deserved. |
| Hard determinism | Not ultimately responsible in the desert-based sense. | The action resulted from prior causes, even if those causes include motives and desires. |
| Compatibilism | Responsible if the action expressed the student's own will and was not coerced or compulsive. | Determined motives do not remove responsibility unless they undermine agency in the relevant way. |
Now change the case: the student plagiarises because someone threatens to harm them unless they do it. The libertarian may still ask whether any genuine alternative remained. The hard determinist will still stress causal determination. The compatibilist will sharply reduce responsibility because coercion prevents the action from expressing the agent's own free will.
This shows that extent is not a decorative word. It asks where responsibility increases, decreases or disappears.
| Factor | Libertarianism | Hard determinism | Compatibilism |
|---|---|---|---|
| Clear understanding of right and wrong | Supports blame if the agent freely chose wrong. | Does not create ultimate responsibility if the choice was determined. | Supports responsibility if the action expressed the agent's own reasons. |
| Coercion or compulsion | May reduce or remove free choice. | Shows another determining cause. | Strongly reduces responsibility because the will is constrained. |
| Strong prior influences | Limits may matter, but do not remove all freedom. | Reinforces the deterministic account. | Matters if it undermines agency, rational control or voluntariness. |
The main evaluative contrast is therefore precise: libertarianism gives the strongest basis for desert, hard determinism gives the strongest challenge to desert, and compatibilism tries to preserve responsibility by redefining the kind of freedom needed.
AO1 To AO2 Bridge
A strong answer on this specification point needs more than three definitions. It should show how each view changes the moral judgement.
| Accurate AO1 point | AO2 judgement it supports |
|---|---|
| Libertarianism says agents can genuinely choose otherwise. | This gives a strong foundation for praise and blame, but it must explain how undetermined choice is controlled rather than random. |
| Hard determinism says choices are causally fixed. | This powerfully challenges desert-based blame, but may struggle to preserve ordinary moral practices such as guilt, gratitude and justice. |
| Compatibilism says freedom can exist within causal determination. | This fits everyday responsibility judgements, but critics may argue that it lowers the standard for genuine freedom. |
A compact paragraph could begin like this:
The extent of moral responsibility depends on what kind of freedom is required. Libertarianism gives the widest responsibility because it claims that agents can be genuine sources of action and could have chosen otherwise. Hard determinism gives the narrowest responsibility because it treats free will as an illusion produced by prior causes. Compatibilism takes a middle position: responsibility is possible if an action flows from the agent's own will, reasons and character, rather than from coercion or compulsion. Therefore, the strongest debate is whether moral responsibility needs ultimate alternative choice, or only voluntary agency.
Useful synoptic links are narrow. The previous AQA bullet on the conditions of moral responsibility helps explain why free will and understanding right and wrong matter. The next bullet on reward and punishment asks what follows from these views, especially whether punishment should be deserved, corrective or protective. Those links should support later essays, but they do not replace this lesson's focus on libertarianism, hard determinism and compatibilism.