Friedrich Nietzsche (1844-1900) has influenced philosophers such as Martin Heidegger, Jean-Paul Sartre, Oswald Spengler, George Grant, Emil Cioran, Albert Camus, Ayn Rand, Jacques Derrida, Leo Strauss, Max Scheler, Michel Foucault and Bernard Williams. His writings on aesthetics, language, truth, morality, cultural theory, history, nihilism, power, and the meaning of existence have exerted a vast influence on Western philosophy and intellectual history.

Stoicism, a school of Hellenistic thought founded in Athens in the third century BC, was one of the most sublime philosophies in the history of Western civilization. It is a way of living that focuses on reality instead of fantasy or idealism. According to its teachings, the path to peace and happiness is found in accepting the moment as it presents itself, by not allowing oneself to be ruled by the desire for pleasure or by the fear of pain.

Being and Time was published in 1927 during the Weimar period in Germany, a time of political, social and economic turmoil. Heidegger himself did not escape the pressures and his nationalism, and undeniable anti-Semitism in the following decades cast a shadow over the man, but not the work. Being and Time is not coloured by expressions of his later views (unlike other writings) and remains an outstanding document.

Sartre's greatest novel and existentialism's key text, now introduced by James Wood, and read by the inimitable Edoardo Ballerini. Nausea is the story of Antoine Roquentin, a French writer who is horrified at his own existence. In impressionistic, diary form, he ruthlessly catalogs his every feeling and sensation.

In the 21st century, Carl Gustav Jung (1875-1961) remains one of the key figures in the field of analytical psychology - and Psychological Types, or The Psychology of Individuation, published in 1921, is one of his most influential works. It was written during the decade after the publication of Psychology of the Unconscious (1912), which effectively ended his friendship and collaboration with Sigmund Freud.