Simone de Beauvoir: A Detailed Biography

Simone Lucie Ernestine Marie Bertrand de Beauvoir (1908–1986) was the French existentialist philosopher, writer, and feminist whose 1949 book The Second Sex became the foundational text of modern feminism. Lifelong partner of Jean-Paul Sartre, author of novels like She Came to Stay and The Mandarins, and winner of the Prix Goncourt, she lived an open, intellectually intense life that embodied her philosophy of freedom and authenticity. This biography covers her bourgeois Paris childhood, meeting Sartre, wartime Resistance, feminist breakthrough, activism, and final years, as documented by the Encyclopaedia Britannica, the Simone de Beauvoir Project, and the British Library.

Early Life in Paris

Bourgeois Catholic Upbringing

Born on January 9, 1908, in Paris to lawyer Georges de Beauvoir and devout Catholic Françoise Brasseur. Raised in a strict bourgeois household, she lost her faith at 14 and declared herself an atheist, as detailed by the Smithsonian Magazine.

Sorbonne and Sartre

Studied mathematics and literature at Institut Sainte-Marie, then philosophy at the Sorbonne. In 1929 she became the ninth woman to pass the agrégation in philosophy — second to Jean-Paul Sartre. Their meeting at a study group began a legendary partnership, as preserved by the Sartre-Beauvoir Centre.

Early Novels and WWII

Taught philosophy in lycées 1931–1943. Published She Came to Stay (1943) — inspired by her ménage à trois with Sartre and Olga Kosakiewicz. During the Occupation she wrote for underground papers and co-founded Les Temps modernes with Sartre (1945), as documented by the History Today.

The Second Sex (1949)

Her masterpiece analysed women’s historical oppression: “One is not born, but rather becomes, a woman.” Banned by the Vatican, it sold 22,000 copies in the first week and became the bible of second-wave feminism, as preserved by the British Library.

Later Works and Activism

Novels The Mandarins (1954, Prix Goncourt) and The Coming of Age (1970). Supported Algerian independence, signed the Manifesto of the 343 (1971) for abortion rights, and became president of the League for Women’s Rights, as documented by the Guardian.

Personal Life

Open lifelong partnership with Sartre — no marriage, no children together. Many lovers including Jacques-Laurent Bost and American Nelson Algren (proposed marriage). Adopted daughter Sylvie Le Bon in 1960, as detailed by the New Yorker.

Death and Legacy

Simone de Beauvoir’s Enduring Impact

Beauvoir died of pneumonia on April 14, 1986, aged 78. Buried beside Sartre at Montparnasse Cemetery. The Second Sex has sold millions and is translated into dozens of languages. She is the mother of second-wave feminism; her existential ethics of freedom and responsibility remain influential, as celebrated by the National Geographic.

Frequently Asked Questions About Simone de Beauvoir

Why Is Simone de Beauvoir Famous?

For The Second Sex — foundational text of modern feminism.

Did Beauvoir Marry Sartre?

No — lifelong open partnership.

Where Was Simone de Beauvoir Born?

Paris, January 9, 1908.

What Is The Second Sex About?

“One is not born, but becomes, a woman” — analysis of women’s oppression.

Was Beauvoir a Feminist Before The Second Sex?

Resisted the label but became feminism’s mother.

Did Beauvoir Win a Nobel Prize?

No — Sartre won and refused in 1964.

How Did Simone de Beauvoir Die?

Pneumonia April 14, 1986, aged 78.