Jean-Paul Sartre was a prominent figure in 20th-century philosophy, known for his existentialist ideas that continue to influence contemporary thought. Born on June 21, 1905, in Paris, France, Sartre was a philosopher, playwright, novelist, and political activist. His philosophical framework, which emphasizes human freedom and responsibility, has had a profound impact on various fields, including philosophy, literature, and politics.

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Sartre was born into a middle-class family. His father, Jean-Baptiste Sartre, was a naval officer, and his mother, Anne-Marie Schweitzer, was a stay-at-home mom. Sartre's early life was marked by a sense of insecurity and uncertainty, which would later influence his philosophical ideas. After his father's death when Sartre was just 15 months old, his mother moved the family to her family's home in Le Havre.

Sartre's phenomenological approach focused on the study of conscious experience or perception. He believed that individuals experience the world through their consciousness, which is always intentional, meaning it is directed towards something outside of itself. This intentionality is central to Sartre's concept of "being-for-itself," which refers to the way in which human beings exist in the world.

Sartre's existentialist philosophy is rooted in the idea that human beings are "condemned to be free." This freedom brings both empowerment and anxiety, as individuals must take responsibility for their choices and actions. Sartre argued that human beings must accept this freedom and the accompanying responsibility, rather than trying to escape or deny it.

Sartre was an exceptional student and attended the École Normale Supérieure (ENS) in Paris, where he studied philosophy from 1924 to 1929. During his time at the ENS, Sartre became acquainted with several influential philosophers, including Emmanuel Levinas and Raymond Aron. He also developed a close friendship with Simone de Beauvoir, who would later become a renowned philosopher and feminist.