How does general deterrence attempt to discourage people from committing crimes?

General deterrence attempts to discourage crime by dissuading the public from following an offender's example. This utilitarian theory assumes that most individuals are rational and will calculate the risks of being caught, prosecuted, and sentenced before committing a crime.1

By observing the penalties imposed on others, potential offenders are theoretically deterred by the fear of similar consequences. This approach is distinct from denunciation, which seeks to educate the public morally by reinforcing the rejection of law-breaking behavior, whereas general deterrence relies on a cost-benefit analysis of potential rewards versus penalties.1

While the theory is a cornerstone of modern criminal law, it remains difficult to validate empirically due to numerous intervening factors in society. Evidence suggests that deterrent effects are most observable when laws are coupled with a high probability of conviction and mandatory penalties, such as in efforts to prevent driving under the influence. Conversely, the effectiveness of severe measures like capital punishment remains a subject of significant debate, with some research indicating it fails to lower crime rates.1