Society & Welfare Western Thinkers

Western Thinkers — Quick Revision

One-page CGPSC quick revision for Western Thinkers: Socrates to Marx, every work, date, quotation and key idea in tables for Mains GS-IV.

4 min read Updated Oct 2026 #quick revision#cgpsc#western thinkers

Ten Western thinkers (plus Machiavelli, Montesquieu and Rawls) on one page: dates, works, quotations, ideas and governance links. For explanations, go back to the chapter.

How to use this sheet
Scan it top to bottom the week before Mains. Bold entries are the facts that short answers and comparisons return to most often.

Timeline

timeline
    title Western thinkers in order
    5th–4th c. BCE : Socrates (d. 399 BCE) : Plato (Academy) : Aristotle (Lyceum 335 BCE)
    16th c. : Machiavelli, The Prince (1513/1532)
    17th c. : Hobbes, Leviathan (1651) : Locke, Two Treatises (1689/1690)
    18th c. : Montesquieu (1748) : Rousseau, Social Contract (1762) : Kant, Groundwork (1785) : Bentham, Principles (1789)
    19th c. : Marx and Engels, Manifesto (1848) : Mill, On Liberty (1859) : Marx, Kapital I (1867)
    20th c. : Rawls, A Theory of Justice (1971)

Thinker by Thinker

ThinkerKey factsCore ideas
Socratesc. 470–399 BCE; wrote nothing; tried 399 BCE (impiety, corrupting youth); hemlockElenchus; virtue is knowledge; no one does wrong willingly; “the unexamined life is not worth living” (Apology)
PlatoAcademy (c. 387 BCE); Republic, Statesman, LawsForms; Allegory of the Cave; justice = each class does its own work; philosopher-king; communism of property and family for guardians only
Aristotle384–322 BCE; Stagira; tutor of Alexander; Lyceum 335 BCE; father of political scienceEudaimonia; virtue by habit; golden mean; “political animal”; six forms; polity best practicable; rule of law; distributive and corrective justice
Machiavelli1469–1527; The Prince (written 1513, published 1532)Politics separate from morality; feared rather than loved; virtù and fortuna
Hobbes1588–1679; Leviathan (1651); English Civil WarState of nature = war of all against all, life “solitary, poor, nasty, brutish, and short”; absolute sovereign; no right to revolt
Locke1632–1704; Two Treatises (1689/1690); Glorious RevolutionNatural rights to life, liberty, property; consent; government as trust; right to resist; tabula rasa; legislative, executive, federative powers
Montesquieu1689–1755; The Spirit of the Laws (1748)Separation of powers with checks and balances
Rousseau1712–1778; Geneva; Discourse on Inequality (1755); Social Contract and Emile (1762)“Man is born free …”; general will vs will of all; inalienable popular sovereignty; direct democracy
Kant1724–1804; Königsberg; Pure Reason 1781; Groundwork 1785; Practical Reason 1788; Perpetual Peace 1795Good will; duty for duty’s sake; categorical imperative (universal law, humanity as end, kingdom of ends); autonomy; dignity
Bentham1748–1832; Introduction to the Principles of Morals and Legislation (printed 1780, published 1789)Pain and pleasure; greatest happiness of the greatest number; quantitative; 7-dimension hedonic calculus; natural rights “nonsense upon stilts”; Panopticon
J.S. Mill1806–1873; East India Company 1823–1858; MP 1865–68; On Liberty 1859; Representative Government 1861; Utilitarianism 1861/1863; Subjection of Women 1869Qualitative utilitarianism (“Socrates dissatisfied”); harm principle; free speech; tyranny of the majority; proportional representation
Marx1818–1883; Trier to London; with Engels; Manuscripts 1844; Manifesto 1848; Kapital I 1867; Gotha Critique 1875Historical materialism; base and superstructure; class struggle; surplus value; alienation; dictatorship of the proletariat; State “withers away” (Engels)
Rawls1921–2002; A Theory of Justice (1971)Justice as fairness; veil of ignorance; difference principle

Famous Lines

LineThinker and source
“The unexamined life is not worth living”Socrates, in Plato’s Apology
“Man is by nature a political animal”Aristotle, Politics
“Solitary, poor, nasty, brutish, and short”Hobbes, Leviathan
“Man is born free, and everywhere he is in chains”Rousseau, The Social Contract
“Nature has placed mankind under … pain and pleasure”Bentham, Introduction to the Principles
“Better to be Socrates dissatisfied than a fool satisfied”Mill, Utilitarianism
“The history of all hitherto existing society is the history of class struggles”Marx and Engels, Manifesto
“The philosophers have only interpreted the world … the point is to change it”Marx, Theses on Feuerbach

Ethics Frameworks

FrameworkThinkerJudges an act byGovernance use
Virtue ethicsAristotleCharacter of the agentTraining, role models
DeontologyKantDuty and principleCodes of conduct, rights
UtilitarianismBentham, MillConsequencesCost–benefit, targeting

Don’t Confuse

ThisvsThat
Academy (Plato)vsLyceum (Aristotle)
Aristotle’s polity (good rule of many)vsAristotle’s democracy (perverted rule of many)
Locke: legislative, executive, federativevsMontesquieu: legislative, executive, judicial
General will (common good)vsWill of all (sum of private interests)
Bentham: quantity of pleasurevsMill: quality of pleasure
Hypothetical imperative (if … then)vsCategorical imperative (unconditional)
Plato’s communism (guardians only)vsMarx’s communism (whole society)
Socialism: to each according to workvsCommunism: to each according to needs
Favourite traps
  • Separation of powers is Montesquieu’s theory, not Locke’s.
  • Aristotle did not favour democracy; his best practicable form was polity.
  • The Communist Manifesto is by Marx and Engels; only Volume I of Das Kapital appeared in Marx’s lifetime.
  • Mill’s harm principle does not allow interference with a competent adult for his own good.
  • “Socialist” entered the Preamble by the 42nd Amendment (1976).
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