All Thinkers

Simone de Beauvoir

Simone de Beauvoir (1908-1986) was a French philosopher, novelist, and feminist thinker. She was born in Paris and studied philosophy at the Sorbonne, where she came second in the national philosophy examination, beaten only by Jean-Paul Sartre, who became her lifelong intellectual partner and companion. She spent most of her adult life in Paris, writing philosophy, fiction, essays, and memoirs. Her most important philosophical work is The Second Sex, published in 1949, which is one of the founding texts of modern feminist philosophy. In it she argued that women are not born inferior but are made to be subordinate through social processes, cultural norms, and internalised beliefs. She was a committed political activist throughout her life, supporting Algerian independence, signing a petition supporting the right to abortion in France at a time when this was dangerous to do, and consistently speaking out on behalf of those without power. She lived by her philosophy: her own life, including her refusal to marry and her insistence on her independence as a thinker, was a demonstration of what she argued was possible.

Origin
France, Western Europe
Lifespan
1908-1986
Era
20th century
Subjects
Feminism Existentialism Political Philosophy Philosophy Of Gender French Philosophy
Skills
Ethical Thinking Cultural Heritage And Identity Critical Thinking Relationships And Communication Citizenship
Why They Matter

De Beauvoir matters because she provided the philosophical foundations for modern feminism. Her argument that one is not born, but rather becomes, a woman established the distinction between biological sex and social gender that has shaped feminist thought and policy debates ever since. She showed that what appears natural about gender, the roles, characteristics, and limitations assigned to women, is in fact socially constructed and could therefore be changed. She also showed how oppression works through internalised beliefs: women who accept their subordination as natural are participating in their own oppression. Liberation requires not only changing external structures but changing how women think about themselves. Her analysis, developed in the specific context of mid-twentieth century France, has proven applicable across very different cultural contexts and has influenced generations of feminist thinkers around the world.

Key Ideas
1
One is not born, but becomes, a woman
This is de Beauvoir's most famous statement, and it establishes the distinction between biological sex and socially constructed gender. She is arguing that the characteristics, roles, and limitations typically associated with women are not natural or inevitable: they are the product of social processes, cultural expectations, and upbringing. A girl is taught from birth what it means to be a woman in her society: what she should want, how she should behave, what she is capable of. These teachings become deeply internalised and can seem like natural facts rather than social constructions. Recognising them as social constructions opens the possibility of changing them.
2
Woman as the Other
De Beauvoir borrowed the concept of the Other from existentialist philosophy to describe the position of women in society. She argued that in every human culture that she examined, men were treated as the default human being, the standard against which everything is measured, while women were defined as the Other: the different one, the exception, the one defined in relation to the male norm. Man is the subject, woman is the object. Man defines himself freely; woman is defined by her relationship to man. This asymmetry, de Beauvoir argued, is not natural but is the result of a long history of social, cultural, and economic arrangements that have kept women in a subordinate position.
3
The internalisation of inferiority
One of de Beauvoir's most important insights is that oppression often works not only through external force but through internalised belief. Women who have grown up in a society that tells them they are less rational, less capable, less important than men can come to believe this about themselves. They take on the identity that society has assigned to them, embracing the role of the Other because it offers security, protection, and a clear social identity. De Beauvoir called this bad faith: choosing to accept a limited identity rather than confronting the frightening freedom and responsibility of authentic existence.
Key Quotations
"One is not born, but rather becomes, a woman."
— The Second Sex, 1949
This is probably the most important sentence in the history of modern feminist philosophy. In one statement, de Beauvoir establishes that gender is not biology but social construction. The characteristics, roles, and limitations associated with being a woman are not natural or inevitable: they are produced through social processes. This means they can be changed. The statement opens a door: if women become what they are through social processes, understanding those processes is the first step towards changing them. This insight became the foundation of decades of feminist research, activism, and policy.
"To be present in the world implies strictly that there exists a body which is at once a material thing in the world and a point of view towards this world."
— The Second Sex, 1949
De Beauvoir is making a philosophical point about the relationship between the body and experience. We do not simply have bodies as objects in the world: we live through our bodies as subjects, experiencing the world from a bodily perspective. This matters for feminism because it means that the specific experiences of having a female body in a particular society, including pregnancy, physical vulnerability, and the social meanings attached to the female body, are genuinely important for understanding women's situation. Feminist philosophy cannot be purely abstract: it must be grounded in the actual bodily experience of women in specific social contexts.
Using This Thinker in the Classroom
Cultural Heritage and Identity When discussing gender roles and social expectations
How to introduce
Ask: what are the social expectations in your community about how women and men should behave? Where do these expectations come from? After discussion, introduce de Beauvoir's argument: these expectations are not natural or inevitable. They are the product of social processes. Ask: can you think of an expectation about your gender that you have internalised so deeply that it feels like just who you are? What would it mean to recognise it as a social construction rather than a natural fact?
Ethical Thinking When discussing freedom, choice, and responsibility
How to introduce
Introduce de Beauvoir's existentialist starting point: we are all fundamentally free, which means we are responsible for what we choose to become. But introduce her complication: our freedom is always situated, shaped and constrained by the social conditions we find ourselves in. Ask: how free do you feel to choose who you become? What social conditions and expectations shape and constrain your choices? Are some people more free than others in this sense?
Further Reading

The Introduction to The Second Sex is the most accessible entry point: it sets out de Beauvoir's central argument about woman as Other and can be read without reading the whole book.

For a short overview

The Stanford Encyclopedia of Philosophy has a freely available article on de Beauvoir.

For a biographical introduction

Deirdre Bair's Simone de Beauvoir: A Biography (1990, Summit Books) is the most thorough English-language account of her life.

Key Ideas
1
Freedom and responsibility in existentialist ethics
De Beauvoir drew on existentialist philosophy, associated with Sartre and Heidegger, in developing her feminist analysis. Existentialism argues that human beings are fundamentally free: there is no fixed human nature that determines what we must be. We define ourselves through our choices and actions. But de Beauvoir developed this idea in ways that went beyond Sartre: she argued that individual freedom cannot be genuinely exercised in conditions of social oppression. When a woman's choices are severely constrained by social expectations, economic dependence, and cultural norms, she is not genuinely free, even if she appears to choose her situation.
2
Economic independence as a condition of freedom
De Beauvoir argued that economic independence is not just desirable for women but a necessary condition of genuine freedom. A woman who is economically dependent on a man, who cannot earn her own living or own property in her own right, is not in a position to make genuinely free choices about her life. She must accept the conditions her economic dependency imposes. De Beauvoir was therefore a strong advocate for women's access to paid work, not only because work provides income but because it provides the economic foundation for genuine autonomy and self-determination.
3
The myth of femininity
De Beauvoir analysed what she called the myth of femininity: the cluster of ideas, images, stories, and cultural expectations that define what a proper woman is. This myth appears in literature, religion, advertising, and everyday social expectations. It defines women as naturally passive, nurturing, emotional, and oriented towards others rather than towards their own development. De Beauvoir argued that this myth serves the interests of those who benefit from women's subordination by making that subordination seem natural and inevitable rather than constructed and changeable.
Key Quotations
"It is not in giving life but in risking life that man is raised above the animal; that is why superiority has been accorded in humanity not to the sex that brings forth but to that which kills."
— The Second Sex, 1949
De Beauvoir is analysing how cultures have historically valued the activities associated with men, particularly warfare and hunting, more highly than the activities associated with women, particularly reproduction and caregiving. She is not endorsing this hierarchy: she is exposing its arbitrariness. The fact that giving life is valued less than taking it is not a natural or logical conclusion; it is a cultural construction. By exposing this construction, de Beauvoir invites us to question it and to imagine a different set of values.
"Self-knowledge is no guarantee of happiness, but it is on the side of happiness and can supply the courage one needs."
— All Said and Done, 1972
De Beauvoir is making a modest but important claim about the value of self-knowledge. She does not say that understanding yourself will make you happy: she knows that genuine self-knowledge can be uncomfortable and that it does not resolve all of life's difficulties. But she argues that it is on the side of happiness because a life lived on false foundations, in bad faith, in self-deception about who you are and what you value, cannot be genuinely good. Self-knowledge gives you the material you need to make genuine choices about how to live.
Using This Thinker in the Classroom
Critical Thinking When examining how ideas about naturalness are used to justify inequality
How to introduce
Introduce de Beauvoir's method: she takes claims about what is natural about women and analyses where these claims come from. Are they based on evidence? Or do they reflect the interests of those who benefit from women's subordination? Ask: can you think of other examples where something that is actually a social construction, a product of historical and cultural processes, is presented as natural and therefore inevitable? How can you tell the difference between what is genuinely natural and what is socially constructed?
Citizenship When discussing women's political and economic rights
How to introduce
Connect de Beauvoir's philosophical arguments to the political history of women's rights. She argued that economic independence is a necessary condition of genuine freedom for women. Ask: what would women need to have genuinely equal economic independence in your society? What legal, social, and cultural changes would be required? Connect to the feminist arc in the thinker library: how does de Beauvoir's argument relate to Wollstonecraft's earlier arguments about women's education and rights, and to bell hooks's later intersectional feminism?
Relationships and Communication When discussing power dynamics in relationships
How to introduce
Introduce de Beauvoir's analysis of heterosexual relationships in conditions of inequality: when one partner is economically dependent on the other and lacks social standing, the relationship cannot be fully equal even if both people genuinely care for each other. Ask: what conditions would need to be in place for a relationship to be genuinely equal? Is equality between partners always desirable? What does equality in a relationship actually look like in practice?
Further Reading

The Second Sex (1949), in the Constance Borde and Sheila Malovany-Chevallier translation (2010, Knopf), is the primary text.

For de Beauvoir's ethical philosophy

The Ethics of Ambiguity (1947, Philosophical Library) is shorter and more accessible than The Second Sex and develops her existentialist ethics in a way that is relevant beyond gender.

For context

Toril Moi's Simone de Beauvoir: The Making of an Intellectual Woman (1994, Blackwell) is the most thorough scholarly account of her intellectual development.

Key Ideas
1
The situated self: freedom in context
De Beauvoir rejected both the idea that humans are entirely determined by their social conditions and the idea that they are entirely free regardless of those conditions. She developed the concept of the situated self: we are always free, in the sense that we always have the capacity to interpret our situation and to act, but we are always also situated, meaning that the social, cultural, economic, and historical conditions we find ourselves in genuinely shape and constrain our possibilities. Understanding how our situation shapes us is a necessary part of understanding what genuine freedom in our particular context would require.
2
Ethics of ambiguity
In The Ethics of Ambiguity (1947), de Beauvoir developed her own existentialist ethics. She argued that human existence is fundamentally ambiguous: we are both free and situated, both individual and social, both mortal and meaning-seeking. An honest ethical life requires acknowledging this ambiguity rather than fleeing from it into bad faith. She argued that genuine freedom is not possible alone: my freedom is bound up with the freedom of others. An individual who pursues their own freedom while accepting or ignoring the oppression of others is in bad faith, because genuine freedom cannot be built on others' unfreedom.
3
Old age and the lifecycle of the body
In her later work The Coming of Age (1970), de Beauvoir applied her philosophical method to the experience of growing old. She argued that old age, like gender, is not only a biological reality but a socially constructed category that determines how old people are treated and how they come to see themselves. Societies that value youth, productivity, and physical ability define old people as no longer fully human and encourage old people to accept this definition. De Beauvoir argued that this was another form of the bad faith she had analysed in The Second Sex: a social construction presented as natural fact in order to justify the marginalisation of a group.
Key Quotations
"Man is defined as a human being and woman as a female. Whenever she behaves as a human being she is said to imitate the male."
— The Second Sex, 1949
De Beauvoir is exposing the asymmetry at the heart of how gender is understood. The default human being is male: human qualities, intelligence, ambition, courage, and reason, are associated with men. When women display these qualities, it is interpreted as imitation of the male rather than as simple humanity. This asymmetry means that women face a double bind: if they conform to feminine expectations, they accept a limited identity; if they do not conform, they are seen as trying to be something other than what they naturally are. De Beauvoir argues that genuine equality requires questioning this asymmetry itself.
"One is not born, but rather becomes, old."
— The Coming of Age, 1970
Twenty years after The Second Sex, de Beauvoir deliberately echoed her most famous sentence in her analysis of old age. She is arguing that just as gender is socially constructed, so is the experience and meaning of old age. How societies define, treat, and relate to old people shapes how old people experience themselves. A society that values people only for their economic productivity will define old age as a form of decline and worthlessness, and old people who internalise this definition will experience old age in those terms. The echo of her earlier argument makes clear that de Beauvoir saw the social construction of identities as a general mechanism, not specific to gender alone.
Using This Thinker in the Classroom
Metacognition When examining how social expectations shape our sense of self
How to introduce
Connect de Beauvoir's concept of the situated self to the Metacognition topic. Ask: how much of what you think of as your own personality, preferences, and values was shaped by your social situation, your family, your culture, your gender, your class? Is there a self beneath these social influences? Or are you, in de Beauvoir's sense, always becoming through these influences? Does recognising this social construction of the self threaten your sense of identity, or can it be liberating?
Global Studies When examining feminist thought across different cultural contexts
How to introduce
Introduce the debate about whether de Beauvoir's analysis, developed in mid-twentieth century France, applies across different cultural contexts. Some feminist thinkers from non-Western contexts have argued that her analysis reflects the specific concerns of educated Western women and misses important dimensions of women's experience in other cultures. Ask: is de Beauvoir's core argument, that women's subordination is socially constructed and not natural, applicable globally? Or are the specific forms of women's subordination so different across cultures that different analyses are needed?
Common Misconceptions
Common misconception

De Beauvoir argued that women and men are identical and that biological differences do not matter.

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What to teach instead

De Beauvoir argued that biological differences exist but that the social meanings and limitations built onto them are not necessary or natural. She did not deny that women's bodies are different from men's: she argued that these differences have been used to justify social arrangements that restrict women's freedom far beyond any biological necessity. The social roles, limitations, and characteristics assigned to women do not follow inevitably from biology: they are additional constructions that can be changed. Her argument is about the gap between biological fact and social construction, not about the non-existence of biology.

Common misconception

De Beauvoir's feminism is only relevant to wealthy, educated Western women.

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What to teach instead

This is a legitimate criticism that some feminist thinkers have made: de Beauvoir's analysis was developed from a specific perspective and does not always adequately address the intersection of gender with race, class, and colonial history. But her core insight, that women's subordination is socially constructed and not natural, has been taken up and developed by feminist thinkers working in very different cultural contexts, including bell hooks's intersectional feminism and feminist thinkers in Africa, Asia, and Latin America. The insight travels even if the specific analysis requires adaptation.

Common misconception

De Beauvoir was against femininity and thought women should be more like men.

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What to teach instead

De Beauvoir was not arguing that feminine characteristics are bad or that women should adopt masculine ones. She was arguing that the characteristics and roles assigned to women are not natural requirements but social constructions, and that women should be free to choose how they want to live rather than having their lives defined by these constructions. Some women may choose traditionally feminine roles; the point is that this should be a genuine choice rather than a socially enforced default. Her vision was not of women becoming more like men but of all people being genuinely free to define themselves.

Common misconception

De Beauvoir's ideas have been completely superseded by later feminist thinkers.

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What to teach instead

Later feminist thinkers, including bell hooks, Judith Butler, and many others, have developed, criticised, and extended de Beauvoir's analysis in important ways. Some concepts, particularly her treatment of race and her analysis of sexuality, have been substantially revised. But her foundational insight, that gender is socially constructed rather than naturally given, remains the starting point for most contemporary feminist thought. Her distinction between sex and gender, and her analysis of how oppression works through internalised beliefs, are still central to feminist philosophy and social theory.

Intellectual Connections
Extends
Mary Wollstonecraft
Wollstonecraft argued in 1792 that women's apparent inferiority was the product of their lack of education and not a natural fact. De Beauvoir takes this argument much further: she provides a complete philosophical analysis of how gender subordination is constructed and maintained through social processes, cultural myths, and internalised beliefs. Both thinkers argue against naturalising inequality, but de Beauvoir has access to existentialist philosophy and a century and a half more of feminist thought and political experience.
Influenced
bell hooks
De Beauvoir's analysis of gender as socially constructed and of oppression as working through internalised beliefs was foundational for bell hooks and other feminist thinkers who developed intersectional approaches. Hooks extended and criticised de Beauvoir: she argued that de Beauvoir's analysis focused too narrowly on gender and failed to adequately address how race and class intersect with gender to produce different experiences of oppression for different women.
In Dialogue With
Frantz Fanon
Fanon and de Beauvoir were near contemporaries who analysed different but structurally similar forms of oppression: Fanon the colonised person defined as Other by the colonial power, de Beauvoir the woman defined as Other by a male-centred culture. Both argue that oppression works through the construction of an inferior Other, both analyse the psychological damage of internalised inferiority, and both argue that liberation requires recovering authentic identity and genuine freedom. Both draw on existentialist philosophy in their analyses.
In Dialogue With
B.R. Ambedkar
Both de Beauvoir and Ambedkar analyse how socially constructed hierarchies come to seem natural and inevitable, and how they are maintained through internalised beliefs as well as external structures. Both argue that liberation requires changing consciousness as well as changing laws and institutions. Both also insist on the importance of economic independence as a foundation for genuine freedom. Their analyses of different systems of oppression share a remarkably similar structure.
In Dialogue With
Jean-Paul Sartre
Sartre was de Beauvoir's lifelong intellectual partner and the philosopher most associated with French existentialism. De Beauvoir's work draws substantially on existentialist ideas about freedom, bad faith, and the situated self. But she also extended and criticised Sartre's philosophy: she argued that his analysis was too individualistic and failed to adequately address the ways in which social conditions constrain individual freedom. Her concept of the situated self, in which freedom is always exercised within social conditions that genuinely shape its possibilities, is a development of and departure from Sartre's existentialism.
In Dialogue With
Ngugi wa Thiong'o
Both de Beauvoir and Ngugi analyse how dominant groups maintain power partly through cultural and ideological means, making their dominance seem natural and inevitable to those they dominate. De Beauvoir analyses this through the myth of femininity; Ngugi through the colonisation of the mind. Both argue that liberation requires challenging the cultural and ideological foundations of oppression, not only its political and economic expressions. Both also insist that this cultural challenge must come from the oppressed group itself, not be handed down from above.
Further Reading

For de Beauvoir in the context of French existentialism: Kate Kirkpatrick's Becoming Beauvoir (2019, Bloomsbury) is the most recent and most thoroughly researched biography, drawing on newly available archives.

For feminist philosophy

Judith Butler's Gender Trouble (1990, Routledge) develops and criticises de Beauvoir's arguments, and the conversation between them is one of the most important in contemporary feminist theory.

For intersectional critique

Bell hooks's Feminist Theory: From Margin to Center (1984, South End Press) engages critically with the tradition that de Beauvoir founded.