Montaigne, philosopher of life, part 1: How to live

Sarah Bakewell: How to believe: What is it to be a human being? Why do I behave as I do? Montaigne did not flinch from these essential questions

This tedious fixation on belief

Michael McGhee: Face to Faith: What is it to believe in God? It may seem odd, but it's not a matter of believing there is a God

Humean philosopher and atheist who ultimately came to believe in intelligent design

French philosopher was killed by arsenic-laced holy communion wafer after airing 'heretic' views, says academic

Philosopher who was a founding father of argumentation theory

A religion that is based on a code of moral injunctions should be approached warily, says David Bryant

Agnès Poirier: Without risk there can be no passion. Philosophers know that, beyond golf, romance is under threat

Obituary: French anthropologist whose analysis of kinship and myth gave rise to structuralism as an intellectual force

Face to faith: We should all celebrate the 150th anniversary of John Stuart Mill's On Liberty, says Andrew Copson

Obituary: Outspoken Polish philosopher frozen out for his trenchant views

Mark Vernon: Robert Wright's latest book sees moral progress in terms of evolution. But is his approach really suited to religion?

The Observer panel: Drivers on the London underground are soothing passengers with the thoughts of Jean-Paul Sartre, Mahatma Gandhi and others

Producers promise blend of Broadway and Vegas for all-dancing, all-singing adaptation of Marx's treatise

The Sun newspaper has cleverly summoned Plato from the grave to contribute a column about Atlantis