How Existentialism Confronts the Meaning of Human Freedom

A Lecture Hall in Paris, October 1945

The Club Maintenant on Rue Jean-Lantier was packed beyond capacity. People fainted from the heat. Chairs were broken in the crush. Jean-Paul Sartre, a 40-year-old philosophy professor with a wandering eye and an unfiltered cigarette, delivered a public lecture titled "Existentialism Is a Humanism." He spoke for over an hour to an audience of hundreds—students, intellectuals, journalists, curious Parisians still processing the end of German occupation. His core claim was five words long: existence precedes essence. You are not born with a purpose. You create your purpose through your choices. That sentence became the manifesto of a philosophical movement that would dominate European intellectual life for the next two decades.

Kierkegaard: The Reluctant Forefather

Sartre did not invent existentialism. The roots stretch back a century to Copenhagen, where Soren Kierkegaard—a wealthy, depressive Danish theologian—wrote furiously against the systematic philosophy of Hegel. Hegel had constructed an all-encompassing rational system in which history progressed toward Absolute Spirit through dialectical stages. Kierkegaard thought this was absurd. No philosophical system could capture the raw experience of being a single individual facing death, guilt, and the terror of genuine choice.

• Kierkegaard wrote under pseudonyms (Johannes Climacus, Anti-Climacus, Constantin Constantius) to embody different perspectives rather than assert a single system
• His concept of "the leap of faith" describes the moment when rational analysis runs out and the individual must commit without certainty
• He identified three stages of existence: the aesthetic (pleasure-seeking), the ethical (duty-bound), and the religious (faith-based)—each requiring a leap to the next
• His work was largely ignored during his lifetime; he died at 42 in 1855

Kierkegaard was a devout Christian. Most later existentialists were atheists. Yet his insistence on the irreducible individual, on anxiety as a fundamental human condition, and on choice as the defining act of existence became the DNA of the movement he never named.

Heidegger: Being Thrown Into the World

Martin Heidegger's 1927 masterwork Being and Time introduced vocabulary that every subsequent existentialist either adopted or argued against. His central concept was Dasein—literally "being there"—the term he used for human existence. Dasein is always already in a world it did not choose. This is Geworfenheit: thrownness. You were thrown into a particular body, family, culture, and historical moment without your consent.

Heidegger's "being-toward-death" is not morbidity. It is the recognition that death—your death, not death in the abstract—gives life its urgency. Without finitude, no choice would carry weight. You could always do it later. Death makes "later" unreliable, and therefore makes the present the only arena for authentic action.

Heidegger's legacy is permanently complicated by his membership in the Nazi Party from 1933 to 1945 and his tenure as rector of Freiburg University under the regime. This complicity remains one of philosophy's most debated moral failures.

Sartre: Radical Freedom, Radical Responsibility

Sartre's existentialism is the most systematic and the most demanding. His 1943 opus Being and Nothingness argues that human consciousness ("being-for-itself") is fundamentally different from things ("being-in-itself"). A rock is what it is. A human is what it is not—consciousness is always projecting beyond its current state, imagining alternatives, negating what is given. This capacity for negation is freedom.

And freedom, for Sartre, is absolute. You are "condemned to be free." Even refusing to choose is a choice. Even in chains, you choose how to interpret and respond to your captivity. This sounds liberating until you absorb its corollary: if you are radically free, you are radically responsible. You cannot blame your upbringing, your biology, your circumstances, or your God. Every choice is yours, and you own its consequences fully.

• Sartre rejected the unconscious as an excuse—you cannot claim "I didn't know why I did it" because consciousness is always self-aware
• He argued that emotions are chosen strategies, not involuntary reactions—a claim that remains controversial
• His concept of "the look" (le regard) describes how another person's gaze turns you into an object, creating shame and self-consciousness
• Sartre refused the 1964 Nobel Prize in Literature, saying no writer should allow themselves to become an institution

Bad Faith: The Lie You Tell Yourself

Sartre's most psychologically penetrating concept is mauvaise foi—bad faith. Bad faith is the act of denying your own freedom by pretending you have no choice. The waiter who performs his role with exaggerated precision, as if being a waiter is his essential identity rather than a contingent occupation, is in bad faith. The woman on a date who lets a man hold her hand while pretending she hasn't noticed—treating her hand as a thing rather than acknowledging the choice to allow or withdraw it—is in bad faith.

Bad faith is not lying to others. It is lying to yourself about your own freedom. And it is, Sartre argues, the default condition. Authenticity requires constant vigilance against the temptation to collapse into a fixed identity—"I'm just not the type of person who..."—and accept the vertigo of genuine choice.

De Beauvoir: Existentialism Meets Feminism

Simone de Beauvoir took Sartre's framework and revealed what he had ignored: freedom is not abstract. It operates within concrete social structures that distribute it unequally. Her 1949 work The Second Sex opens with the observation that "one is not born, but rather becomes, a woman." This is existentialism applied to gender—woman as a social construction imposed on female bodies, a role internalized through upbringing and enforced by institutions.

De Beauvoir's ethics of ambiguity argued that genuine freedom requires willing the freedom of others. Oppressing someone—denying their freedom to make you more comfortable—is the deepest form of bad faith. This ethical extension made existentialism political in a way Sartre's abstract framework alone could not achieve.

Camus and the Absurd: A Fraternal Disagreement

Albert Camus is routinely grouped with the existentialists. He rejected the label. His concern was the absurd—the collision between the human desire for meaning and the universe's silent refusal to provide any. Existentialists like Sartre said you create meaning through commitment. Camus was less certain. In The Myth of Sisyphus (1942), he argued that the honest response to absurdity is neither suicide nor a leap of faith but revolt: continuing to live, fully aware that no cosmic meaning justifies the effort.

"One must imagine Sisyphus happy." The line became iconic. Sisyphus pushes his boulder up the hill, watches it roll back down, and walks back down to begin again—forever. Camus says the walk down, the moment of full awareness, is where freedom lives.

• Camus and Sartre's public falling-out in 1952 was the most famous intellectual breakup of the 20th century
• The disagreement centered on political violence—Sartre supported revolutionary violence in some contexts, Camus rejected it absolutely
• Camus won the Nobel Prize in Literature in 1957 at age 44, making him the second-youngest laureate
• He died in a car accident in 1960 at 46, with an unused train ticket in his pocket

The Literary Dimension

Existentialism thrived in literature because its themes resist systematic exposition. Dostoevsky's Underground Man, who declares "I am a sick man... I am a spiteful man," embodies the confrontation with one's own freedom and its nauseating weight. Kafka's protagonists navigate worlds whose rules are never explained—thrownness made literal. Sartre wrote novels (Nausea) and plays (No Exit, whose "Hell is other people" became the most misquoted line in philosophy). De Beauvoir's novels explored freedom and constraint through female protagonists navigating a world designed to limit them.

Existentialism as a formal movement faded after the 1960s, overtaken by structuralism, post-structuralism, and analytic philosophy. Its influence did not fade. Every therapy session that asks "What do you want to do about it?" rather than "What made you this way?" carries an existentialist assumption. Every civil rights movement that insists people are not defined by the categories imposed on them echoes de Beauvoir. Every individual who refuses to say "I had no choice" is practicing, whether they know it or not, what Sartre preached in that overheated Paris lecture hall in 1945.