Strategic thought: Kautilya, Sun Tzu and Clausewitz

In short

Strategic thought is the body of systematic writing on how organised force and statecraft are used to secure a political community. Three classical texts dominate every syllabus: Kautilya's *Arthashastra* (ancient India), Sun Tzu's *Art of War* (ancient China) and Clausewitz's *On War* (nineteenth-century Prussia). Together they supply the vocabulary of the discipline — saptanga, shadgunya, deception, friction, centre of gravity, war as an instrument of policy — which is then used to read modern doctrine, national security decision-making and crisis behaviour. In India the topic is examined in BA/MA Defence and Strategic Studies papers under UGC CBCS, in UGC-NET Defence and Strategic Studies, in UPSC Civil Services (GS Paper II and the Essay), and in NDA/CDS/AFCAT interviews and SSB group discussions; it is taught professionally at the Defence Services Staff College, Wellington, the Army War College, Mhow, and the National Defence College, New Delhi. Employers and roles that test it include the armed forces, think tanks (IDSA/MP-IDSA, ORF, CLAWS, NMF, Takshashila), defence journalism, and policy research.

Explained

Kautilya's Arthashastra: the state and its purposes

• Text and authorship: attributed to Kautilya, also called Chanakya and Vishnugupta, traditionally minister to Chandragupta Maurya (c. 321–297 BCE). The manuscript was recovered in Mysore and brought to notice by R. Shamasastry (Sanskrit text 1909, English translation 1915); R. P. Kangle's critical edition and translation (1960s) is the standard scholarly reference. Dating is contested — many scholars treat it as a compiled work of the period between the fourth century BCE and the early centuries CE rather than a single author's book.
• Nature of the work: a manual of *arthashastra* — the science of material well-being and statecraft — covering administration, revenue, law, espionage, economy, war and diplomacy in 15 books (adhikaranas). It is prescriptive and amoral in method: the test of an action is whether it secures the state, not whether it is pleasing.
• Matsyanyaya ("law of the fish"): in the absence of authority the big fish eats the small. Hence danda (the rod, coercive authority) and dandaniti (the science of its use) are the foundation of order — a position often compared with Hobbes's state of nature.
• Ends of the state: *yogakshema* — security plus welfare. "In the happiness of his subjects lies the king's happiness; in their welfare, his welfare." Of the three classical goals, Kautilya subordinates dharma and kama to artha, because the other two depend on material power.
• Saptanga (seven limbs/prakritis) of the state — the earliest systematic "elements of national power":
  1. Swamin — the ruler (leadership, legitimacy, decision-making).
  2. Amatya — ministers and bureaucracy.
  3. Janapada — territory and population.
  4. Durga — fortifications (today, defence infrastructure).
  5. Kosha — treasury; "all undertakings depend upon finance."
  6. Danda/Bala — the army and coercive apparatus.
  7. Mitra — allies.
• Vyasanas: the calamities or vulnerabilities of each limb; a ruler ranks threats by which limb is affected and in what order, an early form of risk assessment.
• Intelligence: an elaborate system of gudhapurushas (secret agents) — *samstha* (stationary) and *sanchara* (wandering) — covering internal surveillance, foreign courts and disinformation. Kautilya devotes more space to espionage than either Sun Tzu or Clausewitz.

Kautilya on diplomacy and war

• Rajamandala (mandala/circle of states): a geometric theory of international relations built around the vijigishu (the would-be conqueror at the centre). The immediate neighbour is the natural ari (enemy); the state beyond him is the natural mitra (friend); alternating rings follow — ari-mitra, mitra-mitra and so on. Two states stand outside the rings: the madhyama (an intermediate king strong enough to matter) and the udasina (an indifferent/aloof king stronger still). The standard enumeration gives twelve kings.
• Core insight: enmity and friendship are positional, not moral — a structural-realist idea 2,300 years before the term existed.
• Four upayas (means of dealing with an adversary): sama (conciliation), dana (gifts/inducement), bheda (sowing dissension), danda (force). Force is the costliest and therefore the last.
• Shadgunya (six-fold policy): the operational menu of foreign policy —
  1. Sandhi — peace, treaty, accommodation when weaker.
  2. Vigraha — hostility/war when stronger.
  3. Asana — staying quiet, strategic inaction.
  4. Yana — marching, preparing or mobilising, i.e. coercive signalling.
  5. Samshraya — seeking shelter with a stronger power (alliance/bandwagoning).
  6. Dvaidhibhava — dual policy: peace with one, war with another.
• Choice rule: the measure is relative *sakti* (power), *desa* (space/terrain) and *kala* (time). If weaker — sandhi; if stronger — vigraha; if equal — asana.
• Types of war: prakasha yuddha (open, declared war), kutayuddha (concealed war — deception, ambush, guerrilla action, what today would be called irregular warfare), tushnim/gudha yuddha (silent war — assassination, subversion, covert operations), and mantrayuddha (war by counsel/diplomacy, for the very weak).
• Types of conquerors: dharmavijayi (the righteous conqueror, content with submission), lobhavijayi (the greedy conqueror, who wants land and wealth), asuravijayi (the demonic conqueror, who takes land, wealth, life and dharma). Kautilya counsels the first — occupation must be consolidated by respecting local custom, retaining local elites and winning the conquered population.
• Later Indian tradition: Kamandaka's *Nitisara*, the *Shukraniti*, the Shanti Parva of the *Mahabharata* and Manusmriti carry the same categories forward; the *Thirukkural* also has a section on statecraft and the fort.

Sun Tzu: the Art of War

• Text: *Sunzi Bingfa*, 13 short chapters, traditionally ascribed to Sun Wu of the Spring and Autumn/Warring States era (c. fifth century BCE); well-known translations by Lionel Giles (1910) and Samuel B. Griffith (1963). It is aphoristic, not analytical — the opposite of Clausewitz in method.
• Primacy of calculation: war is "a matter of vital importance to the state"; it must be assessed before it is fought. Five factors (wu shi) for appraisal: Tao (moral influence/unity of purpose), Heaven (climate, season, weather), Earth (terrain, distance, ground), Command (the general's qualities — wisdom, sincerity, humanity, courage, strictness) and Method/Discipline (organisation, logistics, administration). These are compared against the enemy's on seven points.
• Victory without battle: "the supreme excellence is to break the enemy's resistance without fighting." The hierarchy of aims is: attack the enemy's strategy, then his alliances, then his army, and only last his cities.
• Deception: "all warfare is based on deception" — appear weak where strong, feign disorder, offer bait, strike where he is unprepared.
• Knowledge: "know the enemy and know yourself and you need not fear the result of a hundred battles"; this requires both espionage and self-assessment. Five types of agents: local, inside, converted (double), expendable/doomed and surviving agents — with the converted agent rated most valuable.
• Economy and tempo: no state has ever benefited from protracted war; speed, surprise and living off the enemy's supplies reduce cost. Attack where the enemy must respond; avoid his strength, strike his voids.
• Zheng and qi (cheng/ch'i): the orthodox, fixing force and the extraordinary, decisive force used in combination — the ancestor of the modern fix-and-manoeuvre idea.
• Shi: strategic configuration of power/momentum — the general creates a situation in which victory is almost automatic, "like a rolling boulder".
• Terrain and situation: six types of ground and nine varieties of situation, each with a prescribed response; also attack by fire and the management of the army's morale (*qi*).
• Civil–military relation: the ruler should not interfere in field operations — a point in tension with Clausewitz's insistence on political primacy.
• Influence: on Mao Zedong's protracted-war writings, on B. H. Liddell Hart's "indirect approach", and heavily on management and business-strategy literature.

Clausewitz: On War

• Author and text: Carl von Clausewitz (1780–1831), Prussian officer, veteran of the Napoleonic wars, director of the Kriegsakademie. *Vom Kriege* was unfinished at his death from cholera and published in 1832–34 by his wife Marie von Clausewitz. Book I, Chapter 1 is the most mature and most examined part.
• Definitions: war is "an act of force to compel our enemy to do our will"; it is "nothing but a duel on a larger scale". It is a clash of two living, reacting wills — not an engineering problem.
• War and policy: "war is merely the continuation of policy with other means." War is not an autonomous activity; it has its own grammar (military means) but not its own logic (which is political). Political aim determines the military objective and the scale of effort.
• Absolute war and real war: logically, three reciprocal interactions (each side's effort rising to match the other) drive war to its absolute form. In reality friction, imperfect information, the cost of effort, political restraint and the interruption of action keep war limited — producing a spectrum from limited to total war.
• The trinity: war is "a paradoxical trinity" of (i) primordial violence, hatred and enmity; (ii) chance and probability; (iii) subordination to reason as an instrument of policy. Clausewitz then attaches these loosely to the people, the army and its commander, and the government. The three objective tendencies are the trinity; the people-army-government version is the secondary attachment, and the two must not be confused.
• Friction: the gap between war on paper and war in practice — fatigue, weather, breakdowns, misread orders, moral strain. "Everything in war is very simple, but the simplest thing is difficult."
• Fog and uncertainty: "three quarters of the factors on which action is based are wrapped in a fog of greater or lesser uncertainty." Hence coup d'oeil (the intuitive glance) and military genius — the union of intellect and temperament, not a rule book.
• Moral forces: courage, determination, the commander's will and national spirit are decisive and resist quantification — a direct rejection of purely geometric approaches.
• Centre of gravity (Schwerpunkt): "the hub of all power and movement, on which everything depends" — the point against which all energies should be directed. It may be the enemy army, the capital, the alliance, or the will of the people; identifying it correctly is the core act of strategy.
• Defence and attack: defence is the stronger form of war but has a negative aim (preservation); attack is weaker in form but has the positive aim. Hence the ideal is defence followed by counter-attack.
• Culminating point of victory: an offensive weakens as it advances (lengthening lines, casualties, hostile population); the attacker must stop before the balance turns. Also the culminating point of the attack and the diminishing force of the offensive.
• People's war: Clausewitz treats popular insurrection as a legitimate and potent form of resistance, prefiguring modern insurgency theory.
• Contrast with Jomini: Antoine-Henri de Jomini (*Summary of the Art of War*, 1838) sought prescriptive principles — interior lines, decisive points, mass at the decisive point. Clausewitz offered a theory for educating judgement, not rules for application.

Comparing the three, and what they left out

• Method: Kautilya is encyclopaedic and administrative; Sun Tzu aphoristic and psychological; Clausewitz philosophical and dialectical.
• Scope: Kautilya covers the whole state including economy and intelligence; Sun Tzu covers campaigning and the commander; Clausewitz covers the nature of war itself.
• Attitude to battle: Kautilya prefers subversion and diplomacy, and treats battle as the costly last option; Sun Tzu wants victory without battle; Clausewitz holds that the engagement is the real currency of war, though not always fought.
• Deception: central for Sun Tzu and Kautilya (kutayuddha, bheda, agents); for Clausewitz, deception is useful but its cost in effort often exceeds its yield.
• Civil–military: Clausewitz demands political primacy; Sun Tzu wants the field commander left alone; Kautilya fuses the two in the king and his council.
• Shared ground: all three insist on assessment before action, on relative power, on terrain and timing, on morale, and on the political purpose of war.
• Limitations: none addresses air, maritime (beyond riverine), space, cyber, nuclear deterrence, international law or coalition warfare in the modern sense. Nuclear weapons strain the Clausewitzian instrumentality of war; cyber and information operations are read back into Sun Tzu and kutayuddha largely by analogy. Mahan, Corbett, Douhet, Mao, Schelling and Kahn fill the gaps, and the twentieth-century Indian contribution includes K. M. Panikkar on maritime strategy and K. Subrahmanyam on nuclear deterrence.

Indian application and the strategic-culture debate

• The Tanham thesis: George Tanham's 1992 RAND study argued India had little tradition of strategic thinking and planning. Indian scholars rebutted it by pointing to the Arthashastra tradition, and to the practice of Indian statecraft; the debate is a standard exam question.
• Where the categories appear in Indian practice: the official "no first use" and credible minimum deterrence posture, strategic restraint in 1999 and 2001–02, "neighbourhood first" and multi-alignment are regularly analysed through shadgunya; the names Chanakyapuri and the Chanakya Defence Dialogue, the Kautilya Fellowship programmes and courses at Indian staff colleges show the text's institutional presence.
• Doctrine documents to cite: the Joint Doctrine of the Indian Armed Forces (2017), the Indian Army's Land Warfare Doctrine (2018), the Indian Maritime Doctrine and the Indian Maritime Security Strategy, and the structural reforms of the Chief of Defence Staff and the Department of Military Affairs (created 2019) with theatre commands under discussion. Quote doctrine content cautiously — the publicly available versions are periodically revised.

Key points

• Arthashastra - Kautilya's 15-book manual of statecraft; recovered via R. Shamasastry (1909/1915), standard edition by R. P. Kangle; dating disputed.
• Matsyanyaya - law of the fish; justifies danda (coercive authority) as the basis of order.
• Saptanga - the seven limbs: swamin, amatya, janapada, durga, kosha, danda/bala, mitra; an early elements-of-power model.
• Yogakshema - security plus welfare as the purpose of the state; artha ranked above dharma and kama.
• Rajamandala - twelve-king circle; neighbour is enemy, neighbour's neighbour is friend; madhyama and udasina stand outside.
• Four upayas - sama (conciliation), dana (gift), bheda (dissension), danda (force); force is the last and costliest.
• Shadgunya - sandhi, vigraha, asana, yana, samshraya, dvaidhibhava; chosen by relative sakti, desa and kala.
• Kutayuddha and tushnim yuddha - concealed and silent war; subversion and covert action ranked above open battle.
• Three conquerors - dharmavijayi, lobhavijayi, asuravijayi; Kautilya recommends the first and insists on winning the conquered population.
• Sun Tzu's five factors - Tao, Heaven, Earth, Command, Method; compared against the enemy on seven points before war.
• Win without fighting - attack strategy, then alliances, then army, then cities; "all warfare is based on deception".
• Five spies - local, inside, converted, doomed, surviving; the converted (double) agent is the most valuable.
• Zheng and qi, and shi - orthodox fixing force with extraordinary decisive force; shi is created momentum/advantage.
• War as instrument of policy - Clausewitz: war has its own grammar but not its own logic; political aim sets military objective.
• Clausewitzian trinity - violence/hatred, chance/probability, subordination to reason; secondarily people, army, government.
• Friction and fog - the difference between war on paper and in practice; roughly three quarters of information is uncertain.
• Centre of gravity - the hub of all power and movement; the correct object of concentrated effort.
• Defence is the stronger form - with a negative aim; the attack weakens past the culminating point of victory.

Examples

Case 1 — Saptanga audit of a modern state. Apply Kautilya's seven limbs to a notional medium power and rank its vyasanas (calamities).

*Reading:* with kosha as the weakest limb, Kautilya's prescription is clear — avoid vigraha, use sama/dana and samshraya to buy time, and spend on durga and bala from a repaired treasury, since "all undertakings depend upon finance."

Case 2 — Shadgunya decision under three power ratios. Kautilya's rule is relative power, not absolute.

Case 3 — Clausewitzian reading of the Kargil conflict (1999).

1. *Political aim:* restore the status quo ante on the Line of Control while preserving international support — a limited aim, so a limited war.
2. *Trinity:* public anger supplied the element of enmity; the Army and Air Force operated in the realm of chance on unmapped heights; the government held the whole within a political frame, including the decision not to cross the LoC.
3. *Friction:* altitude, acclimatisation, artillery resupply over long axes and incomplete initial intelligence — exactly Clausewitz's gap between plan and execution.
4. *Centre of gravity:* for India, the intruders' dependence on ridge-line supply lines; for the adversary, the sustainability of a deniable operation once denial collapsed diplomatically.
5. *Culminating point:* restraint at the LoC kept the offensive short of the point at which escalation would have cost more than the objective was worth. This is the textbook illustration of policy limiting military logic.

Case 4 — Sun Tzu's five-factor appraisal of a contemplated campaign.

• *Tao:* is the political objective understood and supported at home? If not, do not begin.
• *Heaven:* will the campaign season permit movement and air support, or will weather close the theatre?
• *Earth:* does terrain favour the defender; are lines of communication longer for us than for him?
• *Command:* is the commander granted authority and is the chain unified?
• *Method:* can logistics sustain the force at range without living off hostile territory?

*Verdict rule:* where the enemy scores higher on three or more of the five, Sun Tzu's answer is to attack his strategy and alliances instead of his army — an argument for diplomacy, economic pressure and deception rather than battle.

Case 5 — Classifying conquest by Kautilya's three victors. A power that defeats a neighbour and withdraws on receiving submission and tribute is dharmavijayi; one that annexes territory and resources is lobhavijayi; one that destroys the population, institutions and belief system of the defeated is asuravijayi. Kautilya's advice to the dharmavijayi — keep local laws, customs and elites, and substitute his own virtues for the vanquished ruler's vices — is the ancestor of modern post-conflict stabilisation doctrine.

Where it is used

• Armed forces professional education: Defence Services Staff College Wellington, Army War College Mhow, College of Defence Management Secunderabad, National Defence College New Delhi — where Kautilya, Sun Tzu and Clausewitz frame courses on strategy and war studies.
• Strategic research: analysts and research fellows at MP-IDSA, ORF, CLAWS, CENJOWS, National Maritime Foundation, Takshashila and university Defence and Strategic Studies departments (SPPU Pune, University of Allahabad, University of Madras, Panjab University) use centre of gravity, trinity and shadgunya as analytical templates.
• Civil and foreign service: UPSC Civil Services, IFS and state services; MEA policy planning and briefs on neighbourhood policy routinely invoke the mandala logic.
• Defence journalism and publishing: strategic commentary, doctrine reviews, books and television analysis — the common language of the field.
• Intelligence and internal security: Kautilya's agent typology and Sun Tzu's five spies are standard introductory frameworks in courses on intelligence and covert action.
• Business and management: Sun Tzu and Chanakya feature in corporate strategy, negotiation and leadership training in India; useful in placement interviews for consulting and management-trainee roles.

Interview questions

• Q: What does Clausewitz mean by "war is the continuation of policy with other means"? A: That war is never an end in itself but an instrument used by a political authority; its scale, aims and termination are set by policy, so war has its own grammar but not its own logic.
• Q: State the Clausewitzian trinity correctly. A: Primordial violence and hatred, the play of chance and probability, and subordination to reason as an instrument of policy — attached secondarily to the people, the army and its commander, and the government.
• Q: What are the saptanga and why is kosha emphasised? A: The seven limbs of the state — swamin, amatya, janapada, durga, kosha, danda and mitra; Kautilya stresses the treasury because every undertaking, including war, depends on finance.
• Q: Explain the mandala theory in one line and give its modern parallel. A: States are enemies or friends by position, the neighbour being the natural enemy and the neighbour's neighbour the natural friend — essentially structural realism and the balance-of-power logic.
• Q: List the shadgunya and the rule for choosing among them. A: Sandhi, vigraha, asana, yana, samshraya and dvaidhibhava; the choice turns on relative power, place and time — peace when weaker, war when stronger, inaction when equal.
• Q: Why does Clausewitz call defence the stronger form of war? A: The defender gains from terrain, prepared positions, shorter lines and the advantage of waiting, but his aim is only preservation, so he must eventually counter-attack to achieve a positive result.
• Q: What is a centre of gravity, and give one example of misidentifying it. A: The hub of all power and movement against which effort should be concentrated; treating an insurgency's fighters as the centre of gravity when it actually rests on popular support leads to tactical success with strategic failure.
• Q: How do Sun Tzu and Clausewitz differ on battle? A: Sun Tzu seeks to subdue the enemy without fighting, by attacking his strategy and alliances; Clausewitz holds the engagement to be the true currency of war, even if the threat of it sometimes suffices.
• Q: What is kutayuddha and why is it topical? A: Concealed war — deception, ambush and irregular methods short of declared war; it maps directly onto today's discussion of grey-zone, proxy and information operations.
• Q: Which spy does Sun Tzu value most, and why? A: The converted or double agent, because he gives access to the enemy's own knowledge and can be used to feed back deception.
• Q: Does nuclear deterrence refute Clausewitz? A: Not entirely — total nuclear war would serve no political aim, which strains instrumentality, but Clausewitz's logic of limited war, political primacy and escalation control is precisely what deterrence theory and limited conflicts like Kargil rest on.
• Q: What was the Tanham thesis and how is it answered? A: Tanham (1992) argued India lacked strategic culture and long-range planning; critics answer with the Arthashastra and nitishastra tradition, the record of Indian statecraft, and the growth of formal doctrine and institutions since.

Common mistakes

• Stating the Clausewitzian trinity as "people, army, government" — those are the secondary social carriers, not the three objective tendencies.
• Mistranslating Clausewitz as war being "an extension of politics by other means" and then arguing war replaces policy; his point is the opposite — war remains subordinate to policy throughout.
• Confusing the four upayas with the six shadgunya, or omitting dvaidhibhava and samshraya from the six.
• Listing the saptanga in a garbled order or dropping mitra, and forgetting the vyasanas (calamities) that go with each limb.
• Treating absolute war as a type of war that occurs; it is a logical limit Clausewitz uses to explain why real war is limited.
• Reducing Sun Tzu to quotations about deception while ignoring the five factors, the terrain typology, logistics and the warning against protracted war.
• Calling the Arthashastra simply "immoral" or "Machiavellian" without noting its welfare content (yogakshema, praja sukhe sukham rajnah) and its preference for the dharmavijayi — and asserting a precise date or single authorship when both are disputed.

Related topics

Concepts of national security · International relations theories · Nuclear deterrence and India's nuclear doctrine · Principles of war and military doctrine · Maritime and air power thought: Mahan, Corbett, Douhet · Insurgency, counter-insurgency and hybrid warfare.