Philosophers have provided many perspectives. An influential ancient view was that of the Republic in which Plato explored the question "what is justice?" and postulated that it is not primarily a matter among individuals but of society as a whole, prompting him to devise a utopia. Two thousand years later René Descartes declared "I think, therefore I am" because he believed the human mind, particularly its faculty of reason, to be the primary determiner of truth; for this he is often credited as the father of modern philosophy.[3] One such modern school, existentialism, attempts to reconcile an individual's sense of disorientation and confusion in a universe believed to be absurd.
Many works of literature provide a perspective on the human condition.[2] One famous example is Shakespeare's monologue "All the world's a stage" which pensively summarizes seven phases of human life.[4]