Sartre's partner and biographer who recognized Sartre's profound connection to phenomenology and contributed significantly to existentialist philosophy herself.

An ancient philosopher whose theory of essences is critically examined and challenged in Sartre's exploration of existentialism, particularly regarding the notion that existence precedes essence.

A French philosopher known for establishing the principle of cogito, which is critiqued by Sartre, as Sartre moves towards a phenomenological and existential examination of consciousness.

The founder of phenomenology whose ideas on consciousness and experience heavily influenced Sartre's work, despite Sartre later diverging from Husserl's transcendental focus.

A German philosopher whose existential and phenomenological inquiries inspired Sartre's exploration of being, challenging Heidegger's approach to humanism and essences.

An Enlightenment philosopher whose transcendental idealism intersects with Sartre's existential philosophy, despite Sartre’s critiques of Kant's ideas.

A Danish philosopher and theologian known as the father of existentialism, whose concepts of authenticity and the individual are reimagined by Sartre in discussing meaning through existential living.

A German philosopher whose ideas on nihilism and the rejection of intrinsic essences align with Sartre’s existential theses, although their interpretations of free will and determinism differ.