On theory that I've heard for the justification of ethics and moral responsibility in a deterministic viewpoint was that they would act as a kind of "conditioning" to make society better (i.e. we reward for the hope of them doing good and the future and punish so they refrain from doing bad). Are there any arguments against this viewpoint, and are there any other arguments for moral responsibility from a deterministic perspective?

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This purely instrumental

This purely instrumental justification for assigning moral responsibility is typical of hard determinism, which says that, because determinism is true, agents are never morally responsible for their actions, even though society can benefit from talking and acting as if they were. One obvious objection is that it would be dishonest and unfair to treat agents as morally responsible if in fact they are not.

But there is another deterministic view of moral responsibility: soft determinism. It says that agents can be genuinely morally responsible for their actions, even though determinism is true, provided that the agents (1) act from motives that they would endorse on reflection, (2) know what they are doing, and (3) are not coerced by other agents. All of (1)-(3) are compatible with determinism. For this reason, soft determinism is a compatibilist attitude toward determinism and moral responsibility. It avoids the charge that assigning moral responsibility is dishonest and unfair.

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