A Little History of Philosophy

Nigel Warburton surveys over two thousand years of Western philosophy in 40 brief chapters, each organized around one or more major thinkers. The book traces a tradition rooted in argument, reasoning, and questioning rather than in accepting claims on authority.

Warburton begins in ancient Athens with Socrates, the founding figure of Western philosophy, who asked people questions that exposed the limits of their understanding. Socrates never wrote anything down; his ideas survive through the dialogues of his student Plato. Warburton illustrates the Socratic method through an exchange with an interlocutor named Euthydemus, who claims deceit is always wrong; Socrates counters with the example of stealing a knife from a suicidal friend. The oracle at Delphi declared no one wiser than Socrates, and he concluded this was true because he alone recognized how little he knew. In 399 BC, he was convicted of corrupting the youth and neglecting the city's gods and was executed by hemlock poisoning.

Plato developed his own philosophy through the character of Socrates. His Allegory of the Cave depicts prisoners who mistake shadows for reality, while the philosopher who breaks free sees the world as it truly is. In The Republic, Plato envisions philosopher-kings ruling society, a model Warburton calls profoundly anti-democratic. Plato's student Aristotle rejected abstract Forms and studied the observable world, defining the best life as one pursuing eudaimonia, a Greek word meaning flourishing rather than momentary pleasure. He argued that every virtue lies between two extremes, a principle known as the Golden Mean.

The ancient sceptic Pyrrho (c. 365–c. 270 BC) refused to trust his senses; Warburton distinguishes this extreme scepticism from the moderate questioning at the heart of all good philosophy. The Athenian philosopher Epicurus (341–270 BC) argued that death should not be feared because it is not something one experiences, and that a simple life of friendship leads to happiness. The Stoics, including Epictetus (AD 55–135), a formerly enslaved philosopher, and the statesman Seneca (1 BC–AD 65), taught that people should worry only about what they can control.

Several chapters address philosophy and religion. Augustine (354–430), born in Tagaste in present-day Algeria, wrestled with the Problem of Evil, the question of why a good and all-powerful God allows suffering, and offered his Free Will Defence: God gave humans the capacity to choose, making moral action possible but also allowing evil. Boethius (475–525), writing The Consolation of Philosophy while awaiting execution, argued that God exists outside time, thus reconciling foreknowledge with free will. Anselm (c. 1033–1109), an Italian priest who became Archbishop of Canterbury, offered his Ontological Argument: since God is the greatest conceivable being, God must exist in reality. The theologian Thomas Aquinas (1225–74) argued from causation, calling God the uncaused first cause.

The Florentine diplomat Niccolò Machiavelli (1469–1527) argued in The Prince that rulers must act ruthlessly when necessary. The political philosopher Thomas Hobbes (1588–1679) held that without a powerful sovereign, life would be "solitary, poor, nasty, brutish, and short" (58). The French philosopher René Descartes (1596–1650) pursued certainty by systematically doubting everything, arriving at "I think, therefore I am" and establishing a dualism of mind and body. Blaise Pascal (1623–62), a French mathematician and devout Catholic, argued through his Wager that believing in God is the most rational bet: If God exists, the believer gains eternal bliss; if not, the believer loses little. Baruch Spinoza (1632–77), excommunicated from his Amsterdam synagogue, identified God with Nature itself and argued that free will is an illusion.

John Locke (1632–1704) held that all knowledge comes from experience and personal identity rests on continuity of memory. George Berkeley (1685–1753) argued that objects exist only as ideas in minds. The satirist Voltaire (1694–1778) lampooned the optimism of the philosopher Gottfried Wilhelm Leibniz (1646–1716) through the novel Candide. The empiricist David Hume (1711–76) dismantled the Design Argument for God's existence and attacked miracle testimony.

The political thinker Jean-Jacques Rousseau (1712–78) declared that "Man was born free, and everywhere he is in chains," proposing that legitimate government must align with the General Will, what is genuinely best for the whole community. The German philosopher Immanuel Kant (1724–1804) argued that the mind structures all experience through categories like time, space, and causality, and insisted that actions are moral only when performed from duty and applicable as universal principles. Jeremy Bentham (1748–1832) founded utilitarianism, holding that the right action is whatever produces the greatest happiness. Georg Wilhelm Friedrich Hegel (1770–1831) argued that history is a dialectical process, advancing through clashes of opposing ideas, through which reality, or what he calls Spirit, gradually achieves self-awareness. Arthur Schopenhauer (1788–1860) described reality as a blind force he calls the World as Will, with art providing brief escape.

John Stuart Mill (1806–73) refined utilitarianism by distinguishing higher (intellectual) from lower (bodily) pleasures and defended individual liberty through the Harm Principle, which holds that adults should be free so long as they do not harm others. Charles Darwin (1809–82) developed evolution by natural selection, explaining the appearance of design in nature without invoking God. Søren Kierkegaard (1813–55) explored the anguish of choosing how to live. Karl Marx (1818–83) analyzed history as class struggle between the bourgeoisie, or capitalist owners, and the proletariat, or workers who sell their labor, predicting that revolution would lead to communism.

The American pragmatists C.S. Peirce (1839–1914) and William James (1842–1910) argued that truth is what works in practice. Friedrich Nietzsche (1844–1900) declared "God is dead," meaning belief in God had ceased to be reasonable. Sigmund Freud (1856–1939), the founder of psychoanalysis, identified the unconscious as a domain of hidden desires shaping behavior. Bertrand Russell (1872–1970) advanced the analysis of language, while A.J. Ayer (1910–89) proposed the Verification Principle, declaring meaningless any statement neither true by definition nor empirically testable. The existentialist Jean-Paul Sartre (1905–80) argued that human beings are "condemned to be free"; his companion Simone de Beauvoir (1908–86) applied existentialism to gender, and Albert Camus (1913–60) explored the absurdity of existence through the myth of Sisyphus. Ludwig Wittgenstein (1889–1951) argued that philosophical confusion arises from assuming all words work the same way, when in fact they function in many different "language games."

The political thinker Hannah Arendt (1906–75), reporting on the trial of Nazi administrator Adolf Eichmann, coined "the banality of evil" to describe how an ordinary bureaucrat participated in mass murder by failing to question orders. Karl Popper (1902–94) argued that science progresses through falsification rather than confirmation, while the American historian of science Thomas Kuhn countered that it advances through paradigm shifts, in which an entire scientific framework is replaced. The British philosopher Philippa Foot (1920–2010) and the American philosopher Judith Jarvis Thomson (born 1929) used thought experiments, including the trolley problem, to probe when sacrificing one life to save many is justified. John Searle (born 1932) challenged the claim that computers can think through his Chinese Room argument, contending that symbol-matching rules do not produce genuine understanding. The political philosopher John Rawls (1921–2002) proposed designing society from behind a "veil of ignorance," arguing that people unaware of their position would choose basic liberties and allow inequality only if it benefits the worst off.

Warburton closes with the moral philosopher Peter Singer (born 1946), whom he presents as a modern Socratic gadfly, a persistent questioner who unsettles complacent beliefs. Singer argues that the obligation to save a drowning child extends equally to children dying of preventable causes overseas, champions vegetarianism on the grounds that animal suffering matters morally, and defends euthanasia for individuals in irreversible persistent vegetative states. Warburton frames Singer as embodying philosophy's oldest tradition: challenging assumptions with reasoned argument and insisting that how we think should change how we live.