Who Makes a Soldier? Psychology, Society and the Lessons of Ukraine

Wednesday 19 August 2026

One of the more persistent illusions about warfare is that a soldier is simply an ordinary citizen wearing a uniform. In one sense this must be true. Armies are drawn from societies and, in wars of national survival, societies may be compelled to draw upon virtually everybody. Yet in another sense it is profoundly mistaken. The psychological demands placed upon a person exposed to battlefield conditions are so unusual that it would be surprising if every member of the population were equally suited to them.

The war in Ukraine has forced European societies to confront this uncomfortable proposition. For decades much of Europe imagined warfare principally as a specialised profession. Small numbers of volunteers would be trained to an exceptionally high standard, equipped with expensive technology and deployed in relatively limited operations. Russia’s full-scale invasion of Ukraine shattered that assumption. A prolonged war between substantial states consumes people as well as equipment. Ukraine therefore faces two propositions simultaneously: it needs a great many soldiers, but quantity alone does not create an effective army.

That distinction matters enormously when considering mass conscription.

The psychology of the battlefield

There is probably no single “soldier personality”. Indeed attempts to construct one are liable to descend into caricature. The aggressive man is not necessarily a good soldier; the physically imposing man may not be psychologically resilient; the quiet intellectual may turn out to possess extraordinary composure under pressure. Human behaviour under extreme conditions is notoriously difficult to predict.

Military research nevertheless identifies recurring ingredients of effectiveness. Combat motivation is associated with such things as small-unit cohesion, competent leadership, discipline, confidence, belief in the legitimacy of the mission and confidence that one’s comrades and organisation are capable of performing it.

The first essential characteristic might therefore be called functional courage. Courage is not the absence of fear. A person incapable of recognising danger might be a liability rather than an asset. Useful courage consists in retaining sufficient control over oneself to perform necessary duties despite fear.

This distinction explains something important about military character. Recklessness and courage are not synonyms. The reckless person underestimates risk. The courageous person may understand it perfectly well and nevertheless remain capable of acting rationally.

A second characteristic is emotional regulation. Battlefield conditions impose fatigue, uncertainty, separation, noise, danger and psychological stress. Military literature accordingly distinguishes between adaptive and maladaptive responses to combat and operational stress. The effective soldier must preserve enough cognitive organisation to continue functioning when ordinary routines of civilian life have disappeared.

Third comes discipline. Popular culture often portrays warriors as extreme individualists. Modern warfare demands almost the opposite. Military organisations depend upon individuals suppressing impulses when necessary, following legitimate orders, observing procedures and subordinating immediate personal preferences to collective objectives.

Fourth is adaptability. This characteristic has become particularly important in Ukraine. Modern warfare changes quickly. Technologies, communications, surveillance and tactics evolve continuously. A soldier who can perform yesterday’s procedure perfectly but cannot understand tomorrow’s problem has limited usefulness.

Fifth is conscientiousness — the rather unromantic virtue of doing one’s job properly. War contains moments of exceptional courage but military organisations spend much of their existence performing repetitive tasks in which carelessness may have severe consequences. Reliability may therefore be more valuable than theatrical bravery.

Finally there is social trust. Soldiers must believe that the people around them are competent and that their leaders will not squander their lives pointlessly. Recent military writing continues to emphasise trust as fundamental to cohesion and effectiveness.

These qualities form an intriguing mixture. The effective soldier needs courage without recklessness, obedience without intellectual paralysis, aggression without loss of self-control, loyalty without blindness, independence without selfishness and resilience without emotional numbness.

That is an unusually demanding psychological specification.

Soldiers are not a social class

The interesting question is where such people are found in civilian society.

The answer is: almost everywhere.

There is no obvious civilian profession that monopolises military aptitude. A farmer accustomed to physical discomfort and practical improvisation may possess it. A construction worker may possess it. A nurse accustomed to making decisions under pressure may possess it. A mechanic who can diagnose machinery calmly while everybody else is shouting may possess it. A computer programmer capable of intense concentration and systematic problem-solving may possess it. So may a teacher, lawyer, engineer, electrician, businessperson or university student.

Nor should military aptitude be confused with conventional masculinity. Some people who project toughness in civilian life may react badly to prolonged uncertainty, exhaustion and loss of personal control. Others who appear mild-mannered may reveal remarkable steadiness when circumstances become dangerous.

War is an exceptionally ruthless examiner of personality.

This helps explain why armies cannot simply recruit according to superficial social stereotypes. What matters is not whether somebody resembles the popular image of a soldier. It is whether that person can acquire the psychological and professional habits required by military service.

There is another complication. Different military roles require different psychological profiles. The qualities desirable in a commander are not identical to those required of a technician, medic, analyst, logistician or communications specialist. Modern armies are extraordinarily complicated institutions and the word soldier conceals enormous occupational diversity.

Ukraine has made this particularly obvious. Twenty-first-century warfare requires technical literacy alongside traditional military virtues. Civilian expertise may suddenly acquire military significance — engineering knowledge, computing ability, logistics, medicine, languages, management and innumerable other skills.

A modern army therefore ought not to ask merely, “Who can become a soldier?”

It should ask, “What can this particular citizen contribute to national defence?”

Those are very different questions.

The extraordinary power of the small group

There is nevertheless one characteristic of soldiers that cannot be understood entirely by studying individuals.

People fight in groups.

Military scholarship has long debated precisely why soldiers continue fighting. Friendship and solidarity matter but contemporary analysis distinguishes social cohesion — whether members of a group like one another — from task cohesion, meaning commitment to accomplishing a shared objective. A unit may contain people who are not close friends and nevertheless operate exceptionally effectively because they trust one another professionally and believe in their mission.

This is an important corrective to romantic accounts of warfare.

Soldiers do not necessarily become effective because they discover some hidden warrior identity within themselves. Military organisations can create effectiveness by building competence, confidence, leadership and cohesion. Research on military units has repeatedly associated cohesion with greater resistance to combat stress and stronger capacity for independent small-unit operations.

Training therefore does more than teach skills. It creates expectations.

The soldier learns what the person beside him is likely to do. He learns what his commander expects. He discovers that procedures work and that other members of the organisation possess comparable knowledge. Gradually uncertainty is replaced by institutional trust.

This explains why merely placing a uniform upon a civilian does not produce a soldier.

Ukraine and the paradox of mobilisation

Ukraine’s predicament exposes a fundamental paradox.

An existential war requires mass participation. Yet effective military service depends upon characteristics and preparation that cannot simply be mass-produced overnight.

The extraordinary Ukrainian resistance of 2022 illustrated what strong national motivation can accomplish. Analysis of the Russo-Ukrainian war has emphasised how Ukraine’s early successes reinforced confidence, cohesion and belief in collective capability — all important ingredients in the psychological will to fight.

But wars change as they continue.

The psychology of volunteering during an emergency is different from the psychology of compulsory mobilisation several years later. The first wave of volunteers is inherently self-selecting. People who volunteer for military service during an invasion are disproportionately likely to believe that they can tolerate its demands and that participation is personally meaningful.

Conscription reverses the selection mechanism.

The state increasingly draws upon people who did not volunteer.

This does not mean that reluctant conscripts necessarily make poor soldiers. Human beings frequently discover capacities in themselves that they did not know they possessed. Training, leadership, comradeship and experience can transform behaviour profoundly. Military research itself cautions against assuming that civilian attitudes provide reliable predictions of actual combat behaviour.

Nevertheless there must be diminishing returns.

The broader mobilisation becomes, the greater the proportion of recruits whose civilian abilities may be poorly matched to particular military roles, whose motivation is weaker or whose removal from civilian occupations imposes substantial economic and institutional costs upon the country.

Hence the central strategic mistake is to imagine mobilisation principally as a problem of arithmetic.

The fallacy of interchangeable manpower

Governments at war understandably count people.

There are so many citizens of military age; therefore there are theoretically so many additional soldiers.

But human beings are not interchangeable units of military production.

Imagine two citizens. One is temperamentally resilient, technically competent, physically capable, highly motivated and capable of functioning within a disciplined group. The second reacts poorly to stress, deeply resents mobilisation and possesses specialist civilian skills indispensable to an important industry.

On a demographic spreadsheet they may appear identical.

Militarily they are nothing of the sort.

Nor is the alternative necessarily “front line or exemption”. A sophisticated mobilisation system should contain numerous categories of national service because a modern war effort extends far beyond those serving in directly exposed battlefield roles.

A country at war needs soldiers. It also needs engineers, doctors, factory workers, programmers, railway personnel, energy specialists, administrators, teachers, entrepreneurs and taxpayers. The army itself depends upon the society behind it continuing to function.

Conscription pursued without discrimination can therefore become self-defeating. The state may increase its nominal military manpower while damaging the economic and technological networks required to sustain that military.

The relevant resource is not population.

It is national human capital.

Selection rather than indiscrimination

The lesson is not that conscription is inherently misguided.

Ukraine faces an adversary with a substantially larger population and the endurance demands of prolonged war make manpower unavoidable. Recent military analysis continues to treat endurance as a central principle of warfare. A state defending its existence cannot always rely upon the number of people who spontaneously volunteer.

But there is an enormous difference between mass mobilisation and indiscriminate mobilisation.

The first may be necessary.

The second is usually inefficient.

A rational system should attempt to determine aptitude, motivation, health, technical abilities, temperament and civilian economic importance before allocating people to roles. Some citizens will be unusually suitable for demanding military responsibilities. Others may become excellent soldiers after appropriate training. Others will contribute more effectively through technical, logistical, medical, industrial or civil-defence functions. Still others may be considerably more valuable maintaining essential parts of the civilian economy.

Equality before the law does not require pretending that everyone has identical abilities.

Indeed treating radically different people identically may itself produce unfairness.

Motivation cannot simply be commanded

There is also a political dimension.

Military discipline can compel behaviour to a substantial degree. It cannot manufacture unlimited motivation.

Soldiers are more likely to endure hardship where they believe that their task has purpose, that their leaders are competent and that sacrifices are distributed fairly. Contemporary military doctrine consequently emphasises purpose, direction and motivation as foundations of effective leadership.

This creates an obligation upon governments undertaking mass mobilisation.

The citizen is being asked to surrender an extraordinary degree of autonomy to the state. In return the state acquires an extraordinary responsibility towards the citizen.

It must explain why sacrifice is necessary. It must allocate burdens according to rules perceived as legitimate. It must train people adequately. It must place them in roles for which they have reasonable aptitude. It must cultivate competent leadership. Above all it must preserve the sense that military service represents a rational contribution towards a comprehensible national objective rather than arbitrary exposure to danger.

Coercion can fill establishments.

It cannot by itself create cohesion.

Military scholarship makes precisely this distinction: conformity imposed by hierarchy is not the same thing as genuine cohesion and commitment to a collective purpose.

A nation is more than its army

The deeper lesson of Ukraine may therefore be that twentieth-century ideas of universal conscription require reconsideration for twenty-first-century warfare.

Industrial wars once demanded enormous numbers of relatively interchangeable soldiers. Contemporary war still requires manpower — sometimes enormous quantities of it — but simultaneously demands technological competence, rapid adaptation and preservation of sophisticated civilian economies.

The state must therefore mobilise society without imagining that mobilisation means turning everybody into the same thing.

Some people possess the psychological characteristics associated with exceptional battlefield effectiveness naturally. Others can develop them through training and leadership. Some will never be particularly suited to certain military roles but may possess abilities of immense importance elsewhere in the national struggle.

A wise state discovers which is which.

This is ultimately the distinction between mobilisation as bureaucracy and mobilisation as strategy.

Ukraine has demonstrated beyond serious doubt that ordinary civilians can become extraordinary soldiers when circumstances demand it. It has also demonstrated that national determination, leadership, cohesion and belief in the purpose of resistance can compensate for formidable disadvantages. Yet none of this establishes that every citizen is equally useful in every military function or that the indiscriminate expansion of conscription produces corresponding increases in combat power.

Armies consist of human beings rather than statistics.

The effective soldier is an unusual synthesis — courageous but cautious, disciplined but adaptable, individually resilient but collectively minded, technically competent but psychologically flexible. Such people exist throughout society and often in places where conventional stereotypes would never identify them.

The purpose of intelligent mobilisation is to find them, train them and place them where their abilities matter most — while identifying the equally indispensable people whose greatest contribution to national survival lies somewhere else.

A country fighting for its existence must mobilise its society.

It need not misunderstand it.