Sun Tzu#
Sun Tzu was a Chinese military general, strategist, and philosopher traditionally dated to the late Spring and Autumn period (c. 544–496 BCE). He is best known as the author of The Art of War, one of the most influential works on military strategy in world history. Although Sun Tzu is not an “ethicist” in the classical Western sense, his ideas contain a clear and coherent ethical framework focused on leadership, responsibility, and the moral limits of conflict.
Sun Tzu’s ethical views are found almost entirely in:
The Art of War (500 BCE): This text is not a moral treatise, but ethics are woven throughout its strategic principles. Sun Tzu addresses ethics indirectly through concepts such as righteous leadership, humane treatment of soldiers and civilians, proportional use of force, and the avoidance of unnecessary suffering.
Rulers and governance#
Sun Tzu presents rulers and generals as responsible for maintaining a stable and harmonious society, governing effectively, and preserving authority. These aspects are equivalent in practice, since each depends on the other:
only a harmonious society can sustain a functioning economy, provide reliable taxation, and remain prepared to defend against external threats, thereby enabling a rulers and generals to retain power.
rulers and generals fulfill their role by managing affairs wisely, applying knowledge of diplomacy and warfare, and modeling disciplined conduct.
While Sun Tzu does not frame this guidance as a moral doctrine, his emphasis on careful and restrained action can be considered moral from a Confucian perspective, since it promotes social harmony and the well-being of the people.
Sun Tzu observes that coercion of people is self-defeating. While it may produce compliance in the short term, it erodes loyalty and morale over time. People become exhausted and resentful, and lack the loyalty required to support the ruler in critical situations. When circumstances become high-stakes, discontented soldiers or subjects may rebel or fail to cooperate, directly undermining the ruler’s capacity to govern. It is therefore essential for the ruler to provide for the population’s needs, maintain order, and act consistently and reliably, ensuring that people can trust the ruler to uphold obligations and sustain the stability of the state.
Consequently, a ruler must aim to minimise the suffering of the people. One implication is that war should be regarded as a last resort. A ruler ought to exhaust all other means of securing stability before engaging in direct conflict, which inevitably entails loss of life and the destruction of productive capacity and welfare. For Sun Tzu, the most successful war is the one that is never fought: victory achieved through diplomacy and strategy rather than violence. Treating enemies with regard and transforming them into allies or stakeholders contributes to lasting stability. Occupying a position of superior power discourages aggression altogether.
A good ruler treats both people and soldiers with humanity. They are not mere instruments of policy but integral components of the state, whose collective existence sustains the ruler’s authority. They execute the ruler’s will and defend social harmony, yet they are not to be expended in capricious or ill-considered warfare. To them, the ruler owes careful and informed decision-making, a sustained effort to avoid unnecessary conflict and suffering, and treatment that recognises their essential role in maintaining the stability of the state.
Sun Tzu argues that rulers and generals are responsible for the consequences of their actions. It is imperative that they study ancient wisdom and cultivate the knowledge required to anticipate outcomes accurately. Failures arising from ignorance, poor judgment, or emotional impulsiveness lead to military defeat and instability of the state. A ruler must therefore never act out of anger, pride, or revenge. No personal interest should take precedence over the preservation of authority and social stability.
It is also essential that a ruler remain trustworthy in their dealings with both the people and other states. While Sun Tzu famously permits deception, he treats it strictly as a tactical manoeuvre directed at specific military situations, not as a mode of governance or a narrative to be imposed on society. Deception, like war itself, must serve a precise strategic function and remain limited in scope and duration. When a ruler extends deception beyond the battlefield, using it arbitrarily, for personal interest, or to shape enduring narratives, their credibility is compromised. Such practices erode loyalty at home and weaken diplomacy abroad, as trust among people, allies, and even enemies depends on the expectation of consistency.
Sun Tzu’s ethical guidelines#
Do not start a conflict without serious moral and political justification: Exhaust all diplomatic, legal, and nonviolent options first. Clearly define what injustice or threat must be addressed. Ensure actions serve collective welfare. Reassess justification continuously as circumstances change.
Judge success by long-term peace and stability: Prioritize negotiation, deterrence, and strategic positioning. Use information and influence to resolve disputes early. Measure success by stability and harmony achieved.
Protect the lives of people and soldiers: Avoid unnecessary risk when planning operations. Provide proper training, equipment, and rest. Withdraw or adapt strategy when harm outweighs benefit.
Avoid prolonged conflict: Set clear objectives and exit strategies before engagement. Avoid actions that create endless retaliation cycles. End conflict decisively once objectives are met.
Align your decision and people hearts and minds: Act transparently and explain decisions clearly. Demonstrate fairness in rewards and punishments. Share both risks and benefits with those you lead. Regularly seek feedback and correct abuses of power.
Treat allies and enemies with humanity: Prohibit cruelty, humiliation, or revenge-based actions. Offer paths for reconciliation and reintegration. Set clear rules and expectations in advance. Balance accountability with care.
Avoid unnecessary use of force: Protect infrastructure critical to civilian life. Plan for recovery and rebuilding alongside conflict planning. Avoid actions that cause long-term ecological or economic harm.
Develop skills in administration and politics: Invest in learning, analysis, and foresight. Choose solutions that reduce confrontation. Anticipate consequences before acting. Reward thoughtful problem-solving over aggression.
Use deception only as a tactical tool of war: Maintain consistency and reliability in dealings with allies, troops, and enemies. Keep promises regarding rewards, duties, and obligations to soldiers and officials.
Be an example of moral conduct: Lead by example in discipline and conduct. Build trust through consistency and fairness. Recognize effort and loyalty openly. Create conditions where people follow willingly.