5 Free Will and Determinism
Explore how free will relates to causal determinism, the major positions in the debate, and the kinds of control that may ground moral responsibility.
The question of
concerns control over choices and actions, but philosophers disagree about what that control requires. It may require the ability to choose otherwise, being the genuine source of one’s action, or both.
The debate matters partly because is often thought to ground : whether someone is an appropriate target of praise or blame. These questions are related but not identical. A theory might regard responsibility as compatible with determinism even if it denies that people can choose otherwise.
Determinism, , and chance
is the thesis that the state of the world at a given time, together with the laws of nature, fixes one possible future. If it is true, a person’s choices and actions are part of this causal order.
Determinism is not the same as . says an outcome will occur regardless of what one does; under determinism, deliberating and acting can instead be among the causes that bring an outcome about. Indeterminism—the absence of complete causal determination—does not by itself establish freedom. An action caused by random chance may seem no more under the agent’s control.
and acting freely
holds that can exist even if determinism is true. Compatibilists commonly distinguish acting from one’s own motives and reasoning from acting under coercion or physical restraint. Someone who chooses to donate because they care about others may act freely even if their values and decision have causes. A person forced to donate at gunpoint, by contrast, lacks freedom in an important sense.
Contemporary compatibilists may emphasize more than freedom from restraint: they may also ask whether a person’s decision-making responds to reasons and expresses the person’s own values.
and the control problem
holds that and determinism cannot both be true. The begins from the idea that, if determinism is true, present actions follow from the distant past and the laws of nature—things an agent cannot control. If the consequences of those conditions are therefore not “up to” the agent, the agent may lack the control required for .
Compatibilists dispute whether this reasoning shows that ordinary choice and agency disappear under determinism.
Incompatibilist positions
Incompatibilists disagree about what follows from their position. , in the free-will debate, are incompatibilists who believe that people sometimes have and that determinism is false. Some propose , in which the agent—not merely prior events—causes a choice; others locate indeterminism in events within deliberation. These views must explain how indeterminism makes a choice more controlled rather than merely lucky.
accept determinism and conclude that is absent. argue that is absent whether determinism or indeterminism is true: determination threatens ultimate control, while chance does not supply it.
Alternatives and responsibility
A classic issue is whether responsibility requires the ability to have done otherwise. In , a hypothetical controller would ensure that a person makes a particular choice if needed, but never intervenes because the person makes that choice on their own. The cases are used to argue that someone might be responsible even without a genuine alternative. Critics dispute whether the person truly lacks alternatives in these examples.
The debate points to another possible basis for responsibility: whether the action came from the agent in the right way, rather than whether another action was available.
What responsibility requires
concerns whether an action is attributable to a person in a way that makes praise or blame appropriate. Judgments may depend on capacities such as understanding what one is doing, recognizing relevant reasons, and acting without coercion.
Philosophers disagree about whether these capacities are enough for responsibility under determinism, or whether responsibility requires deeper, ultimate control over one’s character and choices. More broadly, the debate remains contested over whether is necessary for and what kind of control responsibility requires.