As a philosophy expert, I can provide you with an overview of Jean-Paul Sartre's contributions to philosophy.

Jean-Paul Sartre was a French philosopher, playwright, novelist, and political activist who is widely recognized as one of the most important figures in 20th-century philosophy. He is best known for his contributions to existentialism and phenomenology, though his work spans a wide range of philosophical topics.

Sartre's most famous philosophical work is "Being and Nothingness," in which he argues that human existence precedes its essence, meaning that we are not born with a predetermined purpose but rather define our own purpose through our actions. This idea is central to existentialism, which emphasizes individual freedom and choice.

Sartre also developed a theory of social relationships based on the concept of "bad faith" (mauvaise foi), which is the act of deceiving oneself into believing something one knows to be untrue. He believed that people often act in bad faith to avoid the anxiety that comes with the freedom to choose one's own path in life.

In addition to his philosophical work, Sartre was a prolific writer and a prominent public intellectual. He was deeply involved in political and social issues of his time, advocating for socialism and civil rights.

**read more >>

As Sartre later puts it in Existentialism is a Humanism, to be human is characterised by an existence that precedes its essence. As such, existence is problematic, and it is towards the development of a full existentialist theory of what it is to be human that Sartre's work logically evolves.read more >>