40 The Futures of Others
Prospective Social Control, Moral Learning, and Prosocial Choice
40.1 Another agent is not another outcome
Chapter 39 ended with an extension of prospective control beyond the chooser’s own body. Another person’s anticipated pain, relief, fear, or disappointment can alter present affect and action before that person has experienced anything. The extension is real, but it changes the problem.
Consider a traveler who reaches a water cache left for a partner expected hours later. Taking the water would satisfy an immediate need. Leaving it requires control by a state that is absent twice over: the partner is not present, and the partner’s future thirst has not yet occurred. The relevant prediction includes more than a bodily consequence. It includes who the partner is, what the partner will know, what was promised, how much water remains elsewhere, how the partner is likely to respond, and what taking the cache would do to a continuing relationship.
An ordinary nonsocial outcome does not interpret the action taken toward it. Another agent can. The other person has goals, information, memories, and policies of their own. They can misunderstand, retaliate, forgive, reciprocate, warn others, or revise what they expect from the actor. An unfolding interaction therefore couples two control systems: each person’s action changes the conditions under which the other acts. Explicit reasoning about the partner is one way to regulate this interaction; learned responses can also do so without a conscious model. And another person’s welfare can matter even when they will never respond or learn who helped them.
Several routes allow another person’s future to influence present choice. Anticipated suffering can evoke vicarious affect; concern can make the person’s welfare worth improving. What the person knows or intends can change the meaning of the same physical result. A promise can govern action without visible distress, and expected gratitude, punishment, or reputational damage can alter the actor’s own future. These influences can coincide, but they need not share one motive or mechanism.
The raw materials of this control problem did not begin with human moral philosophy. In Langford and colleagues’ mouse experiments, familiar animals receiving noxious stimulation changed their pain behavior in relation to a partner’s pain, with visual access important to the effect [@langfordetal2006miceempathy]. This is social modulation of an ongoing response, not evidence that mice represented an absent partner’s future suffering or endorsed a moral rule. It establishes a simpler continuity: another organism’s condition can become biologically effective without language. Human development extends social control through perspective, remembered relationships, shared norms, promises, and institutions.
Neuroscience can explain how these variables gain control over action. It cannot determine which act is morally right, how much blame a person deserves, or which principles a society should adopt. Those are normative judgments. The scientific problem is narrower and still formidable: how does a controller become governed by consequences that belong to another autonomous controller?
Another person’s possible future can govern present action through vicarious affect, inferred goals and beliefs, learned relationships, norms and commitments, expected reciprocity or sanction, and the anticipated consequences of one’s own conduct. Orbital and ventromedial systems help integrate these variables with value and action, but conscience is not one signal and morality is not one cortical function.
40.2 Distress, empathy, concern, norm knowledge, and control are not synonyms
The word empathy often absorbs operations that need to be separated. A person can identify fear without sharing it, share distress without understanding its cause, understand another person’s belief without caring about the result, or know a rule without allowing it to govern behavior. I use the following distinctions to keep those different control problems visible.
| Contribution | What it makes available to control | What it does not guarantee |
|---|---|---|
| Distress detection | Evidence from cries, expressions, posture, or withdrawal | Sharing the state, understanding its cause, or helping |
| Affective empathy | Sharing an affective state related to the other’s experience, while distinguishing self from other | Accurate perspective or concern for the other’s welfare |
| Personal distress | Self-focused aversive arousal in response to another’s condition | Helping when escape would relieve one’s own discomfort |
| Empathic concern | An other-oriented motivation to improve the person’s welfare | A matching feeling or an accurate estimate of what would help |
| Perspective taking / mentalizing | An estimate of what another sees, knows, believes, intends, or expects | Affective sharing or benevolent motivation |
| Norm knowledge | What a group, relationship, or institution permits, requires, or condemns | Applying the rule in an unfolding interaction |
| Moral judgment | An evaluation of permissibility, obligation, blame, or punishment | Conduct consistent with that evaluation |
Vicarious affect is the broader term: another person’s pain can evoke shared distress, anger at an aggressor, or protective concern. Those are not all the same affective response. Norms can also govern action when no feeling is shared. A promise can remain effective after the person to whom it was made has left the room.
Social and moral control is the further achievement of allowing relevant welfare, intention, relationship, and norm information to reorganize present action. The distinction recalls goal neglect in Chapter 38 and the difference between reportable knowledge and effective choice in Section 39.7. A rule’s availability and its influence are different questions.
The EmpaToM task separates emotional content from the need to infer a speaker’s mental state. Participants watch brief autobiographical accounts, rate their own affect and compassion, and answer questions requiring either mental-state inference or factual understanding. Kanske and colleagues found distinguishable behavioral relationships and neural responses, including anterior insular responses associated with empathy and temporoparietal responses associated with mentalizing [@kanskeetal2015empatorm].
The experiment supports distinguishable contributions within the same task. It does not make an affect rating a direct measure of helping, or a regional imaging response proof that a single area is necessary.
The ordinary word conscience can remain useful for the experienced capacity to be governed by social and moral considerations. It should not be reified as one internal alarm. The scientific task is to explain how several kinds of information become effective together.
40.3 Distress can teach: Blair’s model
James Blair’s developmental account gave one part of this problem a testable mechanism. The original violence-inhibition mechanism drew on comparative observations that submission signals can inhibit aggression, and proposed a related human sensitivity to distress. On this account, another’s distress helps interrupt harmful action and supplies an aversive teaching signal [@blair1995morality]. This is a model of one route into moral learning, not an established reflex that invariably stops aggression.
In human development, distress cues can also act as social reinforcers. A harmful action is followed by crying, fear, withdrawal, parental intervention, or loss of affiliation. Through repeated experience, perceptual features of distress and the actions that caused it acquire learned affective significance. The child does not have to calculate every future consequence from first principles. Contemplating a similar action can retrieve its likely social outcome and reduce the action’s current value before harm occurs.
Blair’s later account emphasized amygdalar contributions to learning the significance of distress and orbital/ventromedial contributions to using expected reinforcement [@blair2007amygdalavmpfc]. That is a theoretical organization of interacting processes. The anatomical setting was established in Section 36.4: temporal, insular, amygdalar, and other inputs reach differentiated frontal territories. Learning changes how those connected systems respond; it does not install an amygdala distress detector wired to a ventromedial conscience.
The model predicted an altered moral–conventional distinction. In these tasks, harm-based violations are ordinarily treated as less dependent on an authority’s rule than violations of local convention. Blair’s original adult study found a reduced distinction, but its direction matters: participants with psychopathy tended to treat conventional violations like moral ones, including judging them wrong despite an authority’s permission. They also referred less often to the victim’s welfare in their justifications [@blair1995morality]. The result was not that they simply judged harming permissible whenever a teacher allowed it.
The study connected a developmental proposal to a measurable judgment. It did not directly measure the proposed learning process or show that one absent distress signal caused the response pattern. Its lasting contribution was to ask how another person’s response can train present behavior, while later experiments would test how reliably the proposed judgment difference appears.
Distress learning is not the whole of moral development. Many obligations protect people whose distress is invisible or delayed. Intention can matter even when no harm occurs, as in an attempted poisoning with an inert substance. A promise can bind action when breaking it would never be discovered. Fairness can apply to anonymous people who display no emotion. Human social control therefore draws on attachment, caregiving, observation, reward and punishment, language, stories, explicit rules, perspective taking, reputation, reciprocity, and repeated practice applying a norm to one’s own conduct.
An evolutionary-developmental account therefore avoids two false choices. Moral control is not an innate module that unfolds independently of experience, and the developing child is not a blank slate on which distress conditioning writes an entire moral code. Selection supplies social sensitivities, attachment systems, affective learning, action control, and capacities for representing other agents. Development organizes those capacities within particular relationships and cultures. Distress learning is one major route into that system because another person’s suffering is one of the most powerful consequences a social animal can encounter.
40.4 What focal lesions reveal about social control
Lesion studies test whether a region and its connections contribute causally to behavior. As Section 36.3 emphasized, orbitofrontal cortex (OFC) and ventromedial prefrontal cortex (vmPFC) are overlapping regional descriptions, not interchangeable parcels. The extent of tissue and white-matter damage matters. The adult-onset cases introduced in Feeling the Future already showed that conventional cognitive abilities can coexist with profound everyday disability. Here the question is more specific: which social information fails to govern behavior?
Beer and colleagues compared four patients with bilateral OFC damage, four with lateral prefrontal damage, and eight healthy participants. The task involved self-disclosure to a stranger. The OFC group knew the relevant intimacy norms but disclosed information inappropriately and overestimated the appropriateness of their performance afterward. Following video replay, their reported embarrassment increased [@beeretal2006selfmonitoring]. The measures were post-task self-appraisal and the change in reported emotion after replay, rather than continuous reports of awareness during conversation.
Two OFC patients also had anterior temporal involvement, with possible amygdala involvement in one. This small, anatomically heterogeneous sample supports a contribution to social self-monitoring without isolating one cortical patch. Nor does embarrassment after replay establish restored conduct in a subsequent interaction.
The comparison with goal neglect is useful: knowing a requirement does not ensure that it shapes one’s current behavior. The social task adds self-appraisal and the consequences of disclosure to another person. Emotion was not simply absent; changing the conditions under which patients viewed their behavior changed the emotional response.
Prosocial effort supplies a different test. Lockwood and colleagues compared 25 patients with vmPFC damage, 15 with lesions elsewhere, and 40 healthy participants. On each trial they chose between a low-effort, low-reward option and a more demanding handgrip option earning more for themselves or another person. The vmPFC group earned less for others and showed greater self–other differences in effort discounting. After accepting work, they also exerted less force for others relative to self than healthy participants did; that force interaction did not significantly distinguish the two lesion groups [@lockwoodetal2024prosocial].
Mapping within the lesion sample linked medial damage to lower willingness to work for others relative to self, and damage in a more lateral orbital region to relatively greater prosociality than damage elsewhere in vmPFC. These are anatomical differences within the sampled patients, not evidence that lateral injury makes people generally kinder. The task separates accepting an effort cost from energizing the chosen action.
A third question concerns judgment of someone else’s action. The intention–outcome experiments below distinguish an actual harmful result from the belief that guided the actor. They ask how information changes a judgment, whereas the self-monitoring and effort tasks ask how it changes one’s own conduct. Those outcomes should not be treated as interchangeable tests of morality.
Developmental timing changes the comparison. Anderson and colleagues studied two adults with prefrontal injuries before 16 months of age. One lesion involved bilateral polar and ventromedial sectors; the other involved right polar cortex medially and dorsally, with underlying white-matter damage. Both had severe social difficulties and deficient social and moral reasoning despite many preserved basic abilities [@andersonetal1999earlypfc]. These were not two selective bilateral vmPFC lesions.
Unlike many adult-onset cases, the early-onset cases also had difficulty demonstrating the social knowledge needed to reason through the tests. Their histories support a developmental contribution of frontal systems, but two cases cannot locate a moral code or establish an inevitable outcome of early injury. Injury changes a developing network and may alter the experiences and responses through which social learning proceeds.
The lesion evidence supports a common theme without requiring a single syndrome. Frontal contributions help make social information effective in self-monitoring, effort, and judgment. Adult injury can separate established knowledge from conduct; early injury can also disrupt the acquisition of usable social knowledge. How these effects arise depends on the damaged tissue, its connections, the developmental history, and the task.
40.5 Developmental psychopathy is not acquired frontal injury
The partial resemblance between focal frontal injury and psychopathic traits has motivated important experiments. It has also encouraged a misleading equation. Developmental psychopathy is not an adult vmPFC lesion moved backward in time.
Psychopathy is a multidimensional research and forensic construct involving varying interpersonal, affective, lifestyle, and antisocial features.
Antisocial personality disorder is a clinical diagnosis that places greater weight on persistent antisocial behavior.
Callous-unemotional traits describe a developmental dimension studied in children and adolescents, often in relation to conduct problems.
The constructs overlap, but they are not interchangeable. Children should not be treated as members of a fixed class of “psychopaths.”
Taxometric studies support a dimensional interpretation of adult psychopathy scores and of broader psychopathy features in youth [@waltersetal2007dimensionality; @murrieetal2007youth]. Research cutoffs can define comparison groups without establishing a discrete natural kind. The facets also matter: interpersonal features include manipulation and grandiosity; affective features include reduced remorse and callousness; lifestyle features include irresponsibility and stimulation seeking; antisocial features include persistent rule breaking and aggression. Similar totals can arise from different combinations.
Impulsivity is therefore not a sufficient definition. In a study using the UPPS-P impulsivity questionnaire, interpersonal–affective scores were associated with less reported difficulty in planning and perseverance, whereas other facets had different relationships to impulsivity [@grayetal2019impulsivity]. This is evidence about dimensions and their measured associations, not a demonstration that everyone high on interpersonal traits is an effective long-term planner.
A recurring difference concerns affective responsiveness. A large meta-analysis found stronger overall associations with reduced affective empathy than with reduced cognitive empathy, but the pattern depended on the trait dimension, conceptual model, and measure [@camposetal2022empathy]. Mental-state understanding is therefore not uniformly abolished or uniformly spared. Understanding someone can serve helping or manipulation; the information available and the motive governing its use are separate questions.
Children and adolescents with disruptive behavior disorders and high callous-unemotional traits have shown reduced amygdala responses to fearful expressions relative to healthy and ADHD comparison groups [@marshetal2008fear]. That imaging difference does not by itself identify deficient concern or establish why the response differs.
Sampling provides one experimentally tractable contribution. In Dadds and colleagues’ 2006 study, boys with higher callous-unemotional traits recognized fearful expressions less accurately during free viewing; instructions to look at the eyes improved performance, whereas instructions to look at the mouth did not produce the same pattern [@daddsetal2006attention]. The blocks had a fixed order, and the effect concerned recognition under instruction, not a lasting change in concern. A separate 2008 eye-tracking study linked the traits to reduced spontaneous sampling of the eyes [@daddsetal2008eyegaze].
In adults, Newman and colleagues measured fear-potentiated startle while prisoners attended either to a shock-predictive feature or to another task feature. Psychopathy-related reductions appeared when attention was directed elsewhere, but not when threat was the focus [@newmanetal2010attention]. This was a response to threat to the participant, not to another person’s suffering. Together, the studies show why attention must be measured alongside affect; they do not reduce every social-affective difference to gaze or distraction.
Anxiety further distinguishes research groups. Sethi and colleagues divided a volunteer sample using affective–interpersonal traits and anxiety. The high-trait, low-anxiety group showed reduced amygdala and insula responses to fearful faces relative to the comparison group; the high-anxiety group showed a different pattern [@sethietal2018variants]. The labels “primary” and “secondary” summarize those groupings. This cross-sectional contrast did not establish two discrete disorders or trace their developmental causes.
Later moral–conventional studies also limit the original generalization. Dolan and Fullam’s adolescent-offender study found that performance depended on the judgment and authority condition rather than showing a wholesale loss of the distinction [@dolanfullam2010moralconventional]. In Aharoni and colleagues’ modified task with 109 incarcerated offenders, total psychopathy score did not predict classification accuracy, although particular facets had different associations [@aharonietal2012moralwrong]. Cima and colleagues likewise found broadly comparable sacrificial-dilemma judgments in their groups [@cimaetal2010rightwrong]. Such answers demonstrate performance on those tasks; they neither establish intact social conduct nor prove an absence of concern.
Autonomic and structural findings require the same care. Reduced skin-conductance responses while observing pain occurred in violent offenders with both higher and lower psychopathy scores in Pfabigan and colleagues’ study [@pfabiganetal2015empathy]. As Section 39.2 established, this measures one sympathetic response, not conscience or the totality of empathy.
The uncinate fasciculus links anterior temporal and orbital-frontal territories as part of broader frontotemporal anatomy. Wolf and colleagues’ diffusion study of 147 incarcerated men associated lower right-uncinate fractional anisotropy especially with interpersonal traits [@wolfetal2015uncinate]. Fractional anisotropy describes directional water diffusion; it is not a direct measure of axon loss, message content, or the ability to care. The uncinate and amygdalofugal pathways introduced in Feeling the Future are broad routes, not dedicated conscience cables [@follonietal2019bundles].
The useful synthesis preserves heterogeneity. Attention to distress, affective learning, valuation, and action control can differ in combinations, and the same outward behavior may arise through different histories. Temperament, caregiving, adversity, peers, and opportunities for learning remain part of the developmental question. The present studies do not establish one causal sequence linking them all.
Acquired lesions and developmental traits provide different kinds of evidence. A lesion can test causal dependence on damaged tissue and connected systems. Trait correlations describe variation in people whose nervous systems and social histories have developed together. Behavioral overlap can motivate a hypothesis about shared processes; by itself, it does not establish that the same process is impaired.
40.6 Moral dilemmas decompose social judgment
Moral dilemmas became influential because a small change in causal structure can reverse a judgment while the final arithmetic remains constant. In the switch case, a runaway trolley will kill five people unless a bystander diverts it onto a track where it will kill one. In the footbridge case, the five can be saved only by pushing a person into the trolley’s path. Both cases exchange one death for five lives. Most participants are more willing to operate the switch than to push the person.
Greene and colleagues’ early imaging work associated personal moral dilemmas with greater engagement of emotion-related processing and helped motivate a dual-process account of moral judgment [@greeneetal2001moral]. The account generated useful predictions, but the switch–footbridge comparison does not isolate emotion against calculation. Both involve choosing an action. They also differ in personal force, causal contact, whether the person’s body is used as a means, and the anticipated experience of acting. An action–omission contrast is a separate manipulation.
Koenigs and colleagues found that six patients with bilateral vmPFC damage more often endorsed harmful action in high-conflict personal dilemmas, with no comparable group difference in low-conflict personal, impersonal, or nonmoral dilemmas [@koenigsetal2007moral]. Ciaramelli and colleagues’ separate seven-patient study also found altered personal moral judgment [@ciaramellietal2007personal]. These findings concern selected hypothetical judgments, not moral judgment in general.
Calling the shifted response “more rational” goes beyond the evidence. Greater endorsement of harm need not reflect improved reasoning or stronger impartial concern. Reduced aversion to instrumental harm is one interpretation, but the lesion studies do not selectively remove emotion while leaving every other contribution unchanged. The measured result is greater endorsement of instrumental harm to improve the aggregate outcome.
That wording matters because a sacrificial response does not by itself identify a moral philosophy or motive. In Kahane and colleagues’ studies, endorsement of sacrifice did not track the broader measures of impartial concern in the way a simple utilitarian interpretation predicted [@kahaneetal2015utilitarian]. A person may favor the aggregate benefit, feel less aversion to harming, or combine both influences. Separating them requires additional measures.
Intention reveals another component. Moral evaluation combines what happened with what the actor believed and tried to do:
| Harmless outcome | Harmful outcome | |
|---|---|---|
| Actor believes the action will be harmless | No harm | Accidental harm |
| Actor believes the action will cause harm | Attempted harm | Intentional harm |
A controller that used outcome alone would condemn accidental harm and excuse a failed attempt. Typical adult judgments also weight what the actor believed. Young and colleagues applied transcranial magnetic stimulation to the right temporoparietal junction (rTPJ), a posterior region near the meeting of temporal and parietal cortex. Relative to control-site stimulation, this reduced the influence of beliefs on judgment, most clearly increasing permissibility ratings for attempted harm [@youngetal2010rtpj]. Belief information still mattered; the intervention did not abolish mentalizing or establish an isolated belief module.
Frontal lesion experiments ask a related question. In Young and colleagues’ vmPFC study, patients judged attempted harms as more permissible, but accidental-harm judgments did not differ reliably from controls [@youngetal2010harmfulintent]. Ciaramelli and colleagues later found both greater permissibility for attempted harm and lower permissibility for accidental harm [@ciaramellietal2012outcome]. Both used belief–outcome contrasts; they did not produce identical results. Together they support a contribution to using inferred mental states when judging outcomes, while leaving open whether a particular deficit concerns representation, affective weighting, integration, or control over the judgment.
These experiments give us a more useful decomposition than a single hot–cold axis. Agency, belief, causal role, outcome, norm, relationship, and anticipated feeling can all matter. The evidence locates causal contributions under particular task conditions. It does not trace a serial rTPJ-to-vmPFC moral pathway, and a permissibility rating is not a measure of subsequent helping or aggression.
40.7 Social exchange: the same choice can have different causes
Economic games make social consequences measurable, but their behavioral outputs remain ambiguous. In the Dictator Game, one player decides how to divide a resource and the recipient cannot respond. A low offer can express strong self-interest, weak concern for equality, low generosity, or a belief that the situation creates no obligation. In the Ultimatum Game, the recipient can reject an unfair offer, leaving both players with nothing. Rejection can express anger, inequity aversion, status defense, punishment, or an attempt to enforce a norm.
A study of incarcerated participants compared performance in these games with performance previously observed after vmPFC lesions. The full prison sample included 47 participants; the critical low-anxiety, high-psychopathy subgroup contained six. That subgroup made lower Dictator offers and rejected more unfair Ultimatum offers, producing a quantitative resemblance to the lesion group [@koenigsetal2010economic]. The result generated a useful hypothesis about overlapping contributions of vmPFC-related systems. A subgroup of six participants cannot establish that psychopathy and focal lesions remove the same mechanism.
A later community study with 35 participants found similar unfair-offer rejection rates in higher and lower psychopathy scorers, despite lower unfairness ratings among higher scorers and different activity–behavior relationships [@vieiraetal2014economic]. The dissociation shows that the overt choice underdetermines the evaluation behind it. Frustration was a proposed explanation; neither frustration nor status defense was selectively established as the cause of rejection.
This returns to a distinction from Chapter 37: an outcome’s identity, its current value, and its influence on behavior are connected but separable. Social tasks add whose outcome it is and how the partner can respond. Similar choices can arise from different evaluations, and different choices can arise even when a stated evaluation is similar. Measuring the judgment, the choice, and the cost a person will actually bear makes the task more informative.
40.8 Prospective social control belongs to a distributed loop
Return to the traveler at the water cache. The current body gives water urgency. Remembered promises and the partner’s likely need change what taking it would mean. A later glimpse of an empty bottle, a message that the partner has been delayed, or discovery of another supply can revise the situation while the traveler is already preparing to act. Valuation, maintenance, anticipation, and social inference continue together.
The anatomical framework is the one developed in The Organ of Tomorrow. Temporal, insular, amygdalar, and memory-related connections provide differentiated frontal territories with information about agents, bodily significance, and context (Section 36.4). Frontal interactions with striatum and thalamus participate in selecting and sustaining action (Section 36.5). Connections toward cortical action systems, hypothalamus, and brainstem allow a represented consequence to change movement and bodily preparation (Section 36.6). These routes do not become a separate moral apparatus when another person is involved.
The experiments add particular constraints to that framework. Attention changes which facial information is sampled. Mental-state information can change judgment when the outcome is held constant. A known norm can fail to constrain disclosure; a decision to work for another person can fail to recruit the same effort as a decision to work for oneself. Each dissociation identifies work that a successful explanation must do. Their combination is a synthesis, not one experiment that has traced every connection.
The recurrent-control illustration in Figure 37.10 already passed through the organism’s body and environment. Here the environment contains another controller. Leaving water changes the partner’s opportunities; taking it may change the partner’s beliefs and future conduct. The response, when it arrives, can revise trust, expectations, and subsequent action. Feedback may be delayed, indirect, or absent, so learned commitments must sometimes remain effective without immediate correction.
Language and culture extend this reach. A promise, contract, reputation, or record can preserve socially relevant information beyond the encounter in which it arose. Those are external supports for control as well as contents to be remembered. The chapter’s narrower question has been how another person’s state becomes effective in the actor; it has not attempted a full account of institutions or the social niche.
I take the evidence to support a control account of social conduct: another person’s possible future can change the conditions under which we act now. Concern is one route; inferred intention, learned obligation, and expected reciprocity are others. What ordinary language calls conscience includes the capacity for these considerations to govern conduct. Explaining that capacity requires their differences as well as their interaction.
40.9 Coda: information for futures shared with others
Social control is limited by what the organism knows. A partner’s reliability, a rival’s likely response, the location of shared resources, the meaning of a local signal, and the norm governing an unfamiliar group are not given in advance. A controller with an inaccurate model of other agents will misjudge both danger and opportunity.
Information about others must therefore be acquired before every need becomes urgent. Social animals watch, approach, test, play, eavesdrop, follow, and sample. Humans ask questions, tell stories, inspect reputations, enter new groups, and explore institutions. These actions cost time and energy and can expose the organism to rejection, deception, or threat. They also enlarge the set of social futures that can later be predicted and controlled.
The next chapter, Wandering When Full, develops the problem of when information is worth its present costs. Its emphasis is how future opportunities, uncertainty, and the time available for using new knowledge alter exploration. Social information is one consequential case: who knows what, who can be trusted, and which relationships may support action when circumstances change.
Established findings. The tasks reviewed here distinguish affective sharing, mental-state inference, norm knowledge, self-monitoring, prosocial effort, and moral judgment. Orbital and ventromedial injury can impair particular contributions while sparing other abilities. Rare early-onset cases show developmental impairments beyond the loss of previously effective control. Psychopathy-related findings differ with trait dimensions, attention, anxiety, task, and sample. Judgment changes after injury or stimulation do not amount to a general loss of morality.
Working synthesis. Another person’s future becomes behaviorally effective through affective significance, inferred mental states, remembered relationships, norms, and anticipated responses. These influences participate in the embodied control systems already developed in the unit. During interaction, action changes the conditions under which both agents act; promises and other commitments can preserve social constraints when feedback is unavailable.
Open questions. Experiments must determine when vicarious bodily response causally drives prosocial action, how distinct psychopathy dimensions arise developmentally, how attentional and affective mechanisms interact, how vmPFC subregions make different social contributions, and how well hypothetical dilemmas and economic games predict conduct in enduring relationships and institutions.