To the extent that human spirits are made gentle by the social state, sensibility increases; as it increases, the severity of punishment must diminish if one wishes to maintain a constant relation between object and feeling.
The severity of punishments ought to be relative to the state of the nation itself. Stronger and more easily felt impressions have to be made on a people only just out of the savage state. A lightning strike is needed to stop a fierce lion who is provoked by a gunshot.