You chose to read this sentence. Or did you? Free will is the capacity to make choices that are genuinely yours, not determined by forces beyond your control. It is central to moral responsibility. If you could not have done otherwise, how can you be blamed for what you did? Philosophers have debated free will for centuries, and the debate shows no sign of resolution.

The main positions are libertarianism, compatibilism, and hard determinism. Libertarians hold that free will is real and incompatible with determinism. They argue that human beings have a special capacity for self-determination that breaks the causal chain. Compatibilists hold that free will and determinism can coexist. Freedom, on their view, means acting according to your own desires and reasoning, without external coercion. Hard determinists hold that determinism is true and free will is an illusion. They argue that moral responsibility is a useful fiction, not a metaphysical fact. Each position has sophisticated defenders, and the debate continues.

Positions on free will

• Libertarianism. Free will is real and incompatible with determinism.
• Compatibilism. Free will and determinism can coexist.
• Hard determinism. Determinism is true, free will is an illusion.
• Hard incompatibilism. Free will is incompatible with both determinism and indeterminism.

Free will matters for law, ethics, and religion. If we are not free, the foundations of blame and punishment need rethinking.