Simone de Beauvoir: The Second Sex and Existentialist Feminism

For decades, philosophy textbooks treated Simone de Beauvoir as an appendix to Jean-Paul Sartre — the gifted companion who applied to the “woman question” ideas that were supposedly not her own. That reading is as tenacious as it is mistaken. Beauvoir was an original philosopher whose contributions to existentialist ethics and to the theory of oppression anticipate, on decisive points, formulations later credited to Sartre. And it was she, not he, who produced the work that would give twentieth-century feminism its philosophical foundation. To read Beauvoir as a thinker in her own right is not a gesture of historiographical courtesy: it is a demand of rigor.

1. Who was Simone de Beauvoir

1.1 Life and formation

Simone de Beauvoir was born in Paris in 1908 and died in the same city in 1986. She studied philosophy at the Sorbonne and, in 1929, sat the agrégation in philosophy — an exam of extreme selectivity in the French university system. That year she placed second; Sartre placed first. Beauvoir was 21 and the youngest candidate ever to pass, which immediately exposes the inequity of the label “Sartre and his disciple”: both were professional philosophers of the first rank.

Her relationship with Sartre — begun in this period and sustained until his death in 1980 — was a singular intellectual and personal partnership, agreed upon as a “necessary” bond open to “contingent” relationships. It is important to record that the exchange was reciprocal: Beauvoir read and criticized Sartre’s manuscripts, and he read hers. To reduce her to the status of follower ignores both the textual evidence and the chronology of the ideas.

1.2 A philosophical and literary body of work

Beauvoir wrote novels, philosophical essays, memoirs, and travel writing, and these forms were never sealed off from one another: for her, literature was a way of exploring concrete moral situations. Among the landmarks:

She Came to Stay (L’Invitée, 1943) — a novel that stages, in fictional terms, the problem of other minds and the conflict between freedoms, a central theme of existential phenomenology.
Pyrrhus and Cineas (Pyrrhus et Cinéas, 1944) — a philosophical essay on action, project, and the relation to the other; a first sketch of her ethics.
The Ethics of Ambiguity (Pour une morale de l’ambiguïté, 1947) — her most systematic ethical statement.
The Second Sex (Le Deuxième Sexe, 1949) — her major work, published in two volumes.
The Mandarins (Les Mandarins, 1954) — a novel about postwar French intellectuals, which won her the Prix Goncourt.
The Memoirs, in several volumes — among them Memoirs of a Dutiful Daughter (1958) and The Prime of Life (1960) — which turn her own life into a field of philosophical reflection.

2. The ethics of ambiguity

Before The Second Sex, Beauvoir had already articulated an existentialist ethics of her own. The Ethics of Ambiguity answers a recurring objection to existentialism: if each person invents their own values and existence precedes essence, how does one escape nihilism or sheer arbitrariness?

Her answer begins from the human condition as ambiguous. The human being is at once facticity — body, situation, past, circumstances not of one’s choosing — and transcendence — the capacity to project beyond the given, to take up ends and open the future. We are neither pure disembodied freedom nor mere objects among objects: we are the irreducible tension between these two poles. The ethical temptation is to deny this ambiguity, whether by fleeing freedom (taking refuge in roles, orders, and given essences) or by feigning a transcendence with no situation.

From this follows the decisive thesis: my freedom depends on the freedom of others. Against a solipsistic reading of freedom, Beauvoir holds that my projects acquire meaning only in a world inhabited by other freedoms, and that to will myself free entails willing the freedom of those with whom I share the world. Oppression is precisely the act of closing off another’s future, of reducing the other to immanence, preventing them from transcending. This ethics of situated and solidary freedom is the philosophical ground on which The Second Sex will be built — and it shows that Beauvoir’s feminism is not a late corollary but the development of an ethics already in place.

3. The Second Sex: “one is not born, but rather becomes, a woman”

Published in 1949, The Second Sex is a monumental investigation of the female condition that mobilizes biology, psychoanalysis, historical materialism, history, myth, and literature. The work is divided into two volumes: the first, Facts and Myths, and the second, Lived Experience.

The book’s most famous sentence — and one of the most quoted in twentieth-century philosophy — opens Volume II: “One is not born, but rather becomes, a woman” (in the original, “On ne naît pas femme: on le devient”). This is a point of accuracy worth attention: the sentence is not found in the book’s opening pages but inaugurates the second volume, in the chapter devoted to childhood. Attributing it loosely to “The Second Sex” without that precision is common, but the careful reader should know where it stands and what it articulates.

The meaning of the sentence is a radical critique of essentialism. Beauvoir denies that there exists any “feminine essence” — a biological, psychological, or metaphysical destiny that determines what it is to be a woman. There is no “eternal feminine” inscribed in nature. To be a woman is the outcome of a long process of formation: upbringing, expectations, institutions, myths, and power relations that mold an individual into a social figure called “woman.” The verb to become is existentialist: it points to a becoming, to a situated construction, not to a fixed datum.

It is precisely here that Beauvoir anticipates the distinction between sex and gender, even though she does not use that vocabulary (the terminological opposition sex/gender would consolidate only later, especially from the 1960s–70s onward). The biological fact — the sexed body — does not dictate the social, psychological, and existential meaning of “being a woman.” Between the datum and the social figure an entire history intervenes. It is from this intuition that the explicit theorization of gender would develop decades later.

4. Woman as the Other

The philosophical core of The Second Sex is the analysis of otherness. Beauvoir starts from a structure that draws on phenomenology and the Hegelian dialectic of recognition: every consciousness tends to posit itself as Subject, casting what is foreign to it as Other. What makes woman’s situation peculiar is the asymmetry of this relation.

In many oppositions — between groups, classes, peoples — otherness is reciprocal: each party is, for the other, the Other. But in the relation between the sexes, Beauvoir argues, a lasting asymmetry took hold: man constituted himself as the Subject, the Absolute, the universal — “the” human being without qualification — while woman was defined as the Other, the inessential before the essential, the second term defined by reference to the first. Man is the referent; woman, the deviation. The very word “man” comes to designate humanity as a whole, and it is in this apparent neutrality that the hierarchy hides.

To describe the poles of this condition, Beauvoir draws on two concepts inherited from her ethics:

Immanence: confinement to repetition, to the maintenance of life, to what neither creates projects nor opens a future — the sphere to which woman has historically been relegated.
Transcendence: the movement of projecting oneself, creating, acting in the world, opening possibilities — the sphere reserved for man as subject.

Woman’s oppression consists, in these terms, in keeping her within immanence, denying her the full exercise of transcendence. This is not a natural incapacity but an imposed situation.

To this structure are added the myths of the “eternal feminine”: woman idealized as mother, muse, virgin, nature, mystery, or temptation. Beauvoir shows that these myths, far from describing real women, are masculine projections that imprison her in a contradictory ideal and excuse others from treating her as a concrete subject. The myth serves oppression precisely because it looks like praise.

5. The concrete situation of woman

Beauvoir does not remain on the abstract plane. The second volume, Lived Experience, is a phenomenology of the stages and roles of a woman’s life, showing how a woman is “made” a woman:

Childhood and youth: the girl is raised for passivity, to please, to see herself as the object of another’s gaze before living as a subject of projects.
Marriage: traditionally presented as woman’s destiny and fulfillment, Beauvoir analyzes it as an institution that frequently fixes her in immanence — in domestic repetition, economic dependence, and a life lived vicariously through her husband.
Motherhood: treated without idealization or simplistic condemnation, but as an ambiguous situation, capable of being a source of alienation when imposed as one’s sole destiny and of fulfillment when freely assumed.
Work: here Beauvoir locates the key to liberation. Economic independence and entry into the productive world are material conditions for woman to reclaim transcendence and assert herself as a subject.

The analysis also includes the figures of the mystic and other forms of evasion, which Beauvoir reads as attempts — sometimes desperate — to give meaning to a confined existence. Her conclusion points toward liberation: not an inversion of the hierarchy, but the abolition of the asymmetry, in a world where men and women recognize one another as free subjects.

Critical analysis

The force of The Second Sex is hard to overstate. Beauvoir provided the philosophical foundation of so-called second-wave feminism, translating the oppression of women from the language of complaint into that of ontology and ethics: inequality is not a natural destiny but a historical situation open to transformation. By articulating otherness, immanence, transcendence, and situated freedom, she gave feminism a conceptual framework it had lacked.

But rigor also requires recording the objections, raised largely by later feminists:

Eurocentric and class-bound universalism: Beauvoir’s “woman” tends to be modeled on the experience of the white, Western, middle- or upper-class woman. Black feminists and thinkers of the global South — and, later, theorists of intersectionality — argued that gender oppression interweaves with race, class, and coloniality in ways Beauvoir’s analysis does not fully capture.
The valuation of immanence and motherhood: by so strongly identifying immanence (the sphere of the body, of care, of the reproduction of life) with oppression, and transcendence (project, work, public action) with freedom, Beauvoir was accused of reproducing a traditionally masculine hierarchy of values, devaluing activities — such as motherhood and care — that other feminists would reclaim as legitimate sources of meaning.
The debate over sex and gender: Judith Butler’s reading of Beauvoir is simultaneously inheritance and critique. Butler takes up the “becomes a woman” in order to radicalize it: if woman is not a datum but a becoming, then — Butler argues — perhaps not even “sex” is a stable pre-cultural substrate, and gender is better understood as performativity. Beauvoir, who still presupposes a sexed body as a factual point of departure, would likely resist that step. The debate over how far denaturalization can go remains open.
Difference feminists: currents that value a feminine specificity (from Luce Irigaray to parts of care feminism) saw in Beauvoir an “egalitarian” model that asks woman to become a subject according to a standard of transcendence inherited from the masculine, rather than affirming a positive feminine difference.

None of these criticisms cancels the work; all make it more alive. Beauvoir is a point of departure so fertile that much of subsequent feminism is built by arguing with her.

Legacy

Beauvoir’s reach is vast. In the United States, The Second Sex directly influenced second-wave feminism; Betty Friedan, in The Feminine Mystique (1963), engages with her analysis of the woman confined to the home. Gender studies as an academic field owe Beauvoir the founding intuition that the feminine is constructed, not given. Judith Butler, in formulating gender as performativity, sets out explicitly from Beauvoir’s sentence, even if to push it beyond what its author would admit.

But perhaps the most important legacy is the recovery, under way for some decades, of Beauvoir as an original moral philosopher — not as a popularizer of Sartrean existentialism, but as a thinker whose ethics of ambiguity and theory of oppression have value of their own. Recent scholarship shows that ideas often credited to Sartre find an earlier or parallel formulation in Beauvoir, and that her attention to embodiment, to situation, and to the reciprocity of freedoms corrects one-sided tendencies in classical existentialism.

To read Beauvoir today is therefore to do two things at once: to recognize the philosophical founder of modern feminism and to repair a historiographical injustice. She was not the shadow of a great philosopher. She was a great philosopher.

1. Who was Simone de Beauvoir#

1.1 Life and formation#

1.2 A philosophical and literary body of work#

2. The ethics of ambiguity#

3. The Second Sex: “one is not born, but rather becomes, a woman”#

4. Woman as the Other#

5. The concrete situation of woman#

Critical analysis#

Legacy#

Recommended reading#