Drawing on more than 500 years of history, this title explores the causes of the crisis in moral description and shows how attempts to formulate moral principles had grown progressively more difficult in the period after the Enlightenment. It explains what has driven moral philosophy into its quagmire and suggests ways out of it.

This monumental book, regarded by many as Sartre's greatest achievement, is one of the most influential philosophical works of the 20th century. In it Sartre set out his fundamental views on philosophy and laid the foundations of existentialism.

Paul Tillich describes the dilemma of modern man and points a way to the conquest of the problem of anxiety. This editions includes a new introduction reflecting on the impact of the book since it was written.

Heidegger's Introduction to Metaphysics is one of the most important works written by this figure of 20th-century philosophy. The new translation aims to make this work more accessible including provision of conventional translations of Greek passages that Heidegger translated unconventionally.

In this work, Teilhard guides the reader back in space-time to experience the birth of our planet as it emprisons the human future in its globe and motion, then forward, through the emergence of life and the birth of thought and socialization.

Standing at the crossroads of psychology and religion, this work applies the scientific method to a field abounding in abstract theory. It believes that individual religious experiences, rather than the precepts of organized religions, are the backbone of the world's religious life.