When someone commits a wrong, people across vastly different cultures share a dual desire to compensate the victim and prevent future harms. Recent research indicates that our urge to punish offenders balances these two needs, requiring rule-breakers to replace what they took while also paying an extra penalty to deter repeat offenses. The findings were published in the journal Psychological Science.
Evolutionary biologists and psychologists have long debated why humans feel the need to punish bad behavior. Standard evolutionary models suggest that the urge to punish developed primarily to enforce cooperation by deterring future bad acts. If anti-social behavior comes with a high price, people are less likely to act badly.
Yet psychological studies frequently show that human punitive feelings do not perfectly align with pure deterrence. Instead, people often act as intuitive retributivists. They want offenders to suffer in exact proportion to the harm they caused, regardless of whether that punishment actually prevents future wrongdoing.
Léo Fitouchi of the Toulouse School of Economics and Manvir Singh of the University of California, Davis, designed a project to test a newer theory that resolves this tension. This model suggests that punishment restores a mutually beneficial balance between a victim and an offender.
Under this model, moral outrage motivates victims to seek compensation for two distinct costs. The first is the direct material loss, such as a stolen animal. The second is the reputational damage of appearing easily exploitable, which invites future theft. To restore balance, a punishment must force the transgressor to compensate the victim for their material loss while paying an additional penalty to deter future exploitation.
Fitouchi and Singh first tested this idea among the Mentawai, a population of rainforest horticulturalists in Indonesia. Mentawai society is politically decentralized, meaning justice is often handled directly between families rather than by a government. When someone breaks a rule or damages property, the offender typically pays a fine, called a tulou, using resources like pigs, chickens, or fruit trees.
The researchers presented 74 Mentawai participants with nine scenarios involving property damage. The scenarios varied the cost to the victim while holding the benefit to the transgressor constant, as well as whether the act was an accident and whether the offender was a repeat rule-breaker. Half the participants prescribed an appropriate fine for the offense, while the other half ranked the scenarios based on how much anger the act provoked.
One scenario featured an extra-harm condition where an offender steals a pig, but in doing so, accidentally causes the death of the victim’s piglets. The thief gains the same benefit as a normal theft, but the victim suffers a much higher cost.
Fitouchi and Singh found that the moral outrage reported by one group of participants predicted the severity of the fines demanded by the other group. Mentawai participants wanted victims compensated in the exact currency of their loss, requiring pigs to replace stolen pigs and coconuts to replace felled trees. When a scenario involved extra harm to the victim without any added benefit to the offender, participants reported higher outrage and demanded higher fines.
The researchers also identified a distinct deterrent component in the participants’ responses. Fines almost always included an additional penalty beyond the simple replacement of the lost property. Repeat offenses, which suggest the victim is highly vulnerable to future exploitation, generated higher outrage and larger fines. Accidental offenses, which signal a lower risk of future exploitation, generated lower outrage and lower fines.
To see if these patterns apply in a large-scale, industrialized society, the researchers replicated the experiment with 600 participants in the United States. They adapted the scenarios to fit a rural American context, describing disputes between two farmers over cows, hogs, and vegetable gardens. Each vignette specified the value of the damaged resource in United States dollars, setting a cow at $1,500 and a hog at $500. Participants prescribed fines in dollars and rated their outrage on a numerical scale.
The results from the American participants closely matched those from the Mentawai participants. Moral outrage again predicted the size of the prescribed fines, and scenarios involving extra harm resulted in heavier financial penalties. The American participants also demanded an extra penalty beyond strict restitution for most offenses.
Similar to the Mentawai participants, the American respondents reacted more strongly to repeat offenses, demanding heavier fines for repeat offenders. In contrast, almost half of the American participants decided that accidental harms required no extra penalty at all. They asked only that the offender replace the exact value of the destroyed property.
The research focused exclusively on private grievances between individuals, such as property damage or theft. People in many societies treat interpersonal conflicts differently than broader offenses that harm an entire community. These findings might not apply to the punishment of community-wide crimes.
The experimental scenarios also intentionally featured victims and offenders of equal social standing. This design removed power dynamics that usually influence how people prescribe punishments. The field data collection in Indonesia was also restricted by logistical constraints, resulting in a modest number of participants for that portion of the project.
Additionally, the project surveyed only two specific populations. Human societies maintain a vast diversity of justice systems, which likely correspond to an equally diverse range of attitudes about punishment and restitution. Future research expanding to other cultures would help clarify the universal boundaries of human punitive psychology.
The study, “Retributive Sentiments Track Both Deterrent and Compensatory Concerns in a Small-Scale Society and a WEIRD Sample,” was authored by Léo Fitouchi and Manvir Singh.