Philippa Foot (1920–2010) was one of the most influential British moral philosophers of the twentieth century. Born in Lincolnshire into a distinguished family—her maternal grandfather was U.S. President Grover Cleveland—Foot studied Philosophy, Politics and Economics at Somerville College, Oxford. After wartime work as an economist, she returned to Oxford and helped shape an era of analytic philosophy, later holding a professorship at UCLA.
Foot came of age in a period dominated by logical positivism and non-cognitivist ethics, where moral language was often treated as mere emotional expression rather than a realm of truth and reason. She challenged this tendency from within the analytic tradition, arguing that moral judgments can be rational, grounded, and objective in meaningful ways. Her work gradually evolved toward a revival of virtue ethics, culminating in her later magnum opus, Natural Goodness.
Key Ideas
Reviving Virtue Ethics
At a time when moral philosophy was primarily split between consequentialism (morality judged by outcomes) and deontology (morality judged by duties or rules), Foot turned attention back to character. Drawing inspiration from Aristotle, she argued that ethics is fundamentally about what kind of person a human being should strive to become, and how those virtues help us flourish.
Virtues such as courage, justice, honesty, and temperance are not arbitrary preferences or social fashions. They are dispositions that allow humans to live well and cooperate meaningfully. A courageous person does not fearlessly rush into danger for vanity’s sake; rather, courage is the stable capacity to face danger for the right reasons, in the right measure. Foot insisted that virtues have a rational basis: they are grounded in what it means to be a human being living a successful human life.
Natural Goodness
Foot’s book Natural Goodness develops a naturalistic theory of ethics. She argues that goodness is not a matter of subjective feeling but can be understood in relation to the life-form of a species. Just as we can say that good roots in a plant are those that draw up nutrients effectively, we can say that good character traits in humans are those that allow us to fulfil our nature as rational, social beings.
This position places Foot in a unique space: she rejects both rigid moral relativism and metaphysically inflated moral realism. Instead, she grounds ethics in life, function, and human capacities. For Foot, virtues are excellences of human functioning, necessary for flourishing lives. That does not make morality easy or neat—but it does make it intelligible.
The Trolley Problem and Double Effect
Foot is also famous for introducing what became known as the trolley problem, originally to illuminate debates around the Doctrine of Double Effect (DDE). This doctrine, often associated with Catholic moral reasoning, distinguishes between intending harm and foreseeing harm as a side-effect.
Foot proposed the now-famous scenario: a runaway trolley is set to kill five people. You can divert it to a track where only one person stands. Should you pull the lever?
This thought-experiment pushes us to test our intuitions about doing versus allowing harm, intention versus consequence, and the moral relevance of each. Although contemporary versions often focus on rule-vs-outcome tension, Foot’s aim was subtler: to challenge utilitarian logic by showing how our moral judgments depend on deeper distinctions about agency and character.
Influence
Foot helped shift analytic philosophy away from treating ethics as mere linguistic analysis and back toward serious engagement with normative questions—what we ought to do, and why. She was instrumental in the revival of virtue ethics alongside thinkers like Elizabeth Anscombe and Alasdair MacIntyre, and her legacy continues through philosophers such as Rosalind Hursthouse.
The trolley problem has escaped academia entirely, appearing in ethics classrooms, policy discussions, television dramas, and even self-driving-car engineering debates. Yet Foot herself may have smiled wryly at its pop-culture fame; her deeper intent was always to cultivate clear thinking about moral character and human flourishing.
Why Philippa Foot is important
Foot’s thought speaks to modern challenges:
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In an age dominated by algorithms and outcomes, she reminds us that who we are matters as much as what we produce.
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When ethical debates become polarised or procedural, her work centres character, judgement, and the dignity of the moral agent.
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In a world where AI ethics often emphasises consequences and rule-setting, her perspective offers a fresh question: what kind of “moral being” ought an intelligence aspire to be?
Her philosophy invites us to cultivate virtues rather than chase metrics; to value reasons as well as results; and to build societies in which flourishing depends not only on efficiency but on character.
Reading List
- Natural Goodness – Philippa Foot
- Virtues and Vices – Philippa Foot
- Modern Moral Philosophy – Elizabeth Anscombe (influential companion piece)
- After Virtue – Alasdair MacIntyre (develops the virtue ethics revival)
