A French philosopher, political activist, novelist, and playwright, among his varied portfolio. His philosophy primarily concerned existentialism, in which he was highly influenced by Heideggar, Husserl, and the founders of the subject, Kierkegaard and Nietzsche. His ideas on existentialism have come to define the subject. Among his numerous highly-acclaimed works, his most popular include "No Exit," "The Wall," "Being and Nothingness," and "Nausea."
You'll have to excuse me, I'm having an existential crisis due to having read "No Exit" by Jean-Paul Sartre...