Philosophy has always been dangerous for philosophers; Friedrich Nietzsche made it dangerous for everyone. His ideas presaged a collective madness which was to ravage Europe throughout the first half of the 20th century, drawing a chilling parallel with the insanity that gripped Nietzsche towards the end of his life. His philosophy is one of aphorisms and penetrating psychological insights, his major concept being the Will to Power - a notion that he saw as the basic impulse for all our acts. Viewing Christianity as a subtle perversion of this concept Nietzsche is famous for his pronouncement that ‘God is dead’.

Philosophy for busy people. Listen to this succinct account of the philosophy of Wittgenstein in just one hour. Ludwig Wittgenstein saw himself as ‘the last philosopher’. In his view, philosophy in the traditional sense was finished. A superb logician, Wittgenstein distrusted language and sought to solve the problems of philosophy by reducing them to the purest form of logic. Everything else - metaphysics, aesthetics, ethics, finally even philosophy itself - was excluded.

Philosophy for busy people. Listen to this succinct account of the philosophy of Derrida in just one hour. Jacques Derrida’s ‘deconstructionism’ is nothing less than an effort to destroy all ‘writing’ by demonstrating its inevitable falsehood. The writer writes but does not know what he is writing. Derrida argues that all texts have their own hidden agenda and contain their own metaphysical assumptions – the writer’s very language inevitably distorts what he thinks and writes.

Philosophy for busy people. Listen to this succinct account of the philosophy of Kant in just one hour. Immanuel Kant taught and wrote prolifically about physical geography yet never travelled farther than forty miles from his home in Königsberg. Appropriately, his philosophy strenuously denies that all knowledge is derived from experience, insisting instead that all experience must conform to knowledge. Kant’s aim was to restore metaphysics.

Philosophy for busy people. Listen to a succinct account of the philosophy of Hegel in just one hour. With Hegel philosophy became very difficult indeed – even the great man himself conceded that ‘only one man understands me, and even he does not.’ His dialectical method produced the most grandiose metaphysical system known to humanity, and included absolutely everything, its most vital element being the dialectic of the thesis, antithesis and synthesis.

How do those in power exercise that power over a state's citizens? French thinker Michel Foucault's 1975 work Discipline and Punish looks to answer this question by investigating the prison system. Foucault does not believe that the modern-day system developed out of reformers' humanitarian concerns. He argues that prison both created and then became part of a bigger system of surveillance that extends throughout society.

One of the two major philosophical traditions of the 20th century was linguistic analysis, derived largely from Wittgenstein. The other, diametrically opposed, came from Heidegger, and its fundamental question was: ‘What is the meaning of existence?’ For Heidegger, this was not a query that could simply be ‘analysed away’ - it was beyond the reach of logic or reason. This was the primary ‘given’ of every individual life. To confront it, Heidegger needed to develop an entirely new form of philosophy. Here is a concise, expert account of Heidegger’s life and philosophical ideas that is entertainingly written and easy to understand.

Philosophy for busy people. Listen to a succinct account of the philosophy of Hume in just one hour.Hume reduced philosophy to ruins, denying the existence of everything except our actual perceptions themselves. The world is nothing more than part of my consciousness. Yet we know the world remains, and we go on as before. What Hume expressed was the status of our knowledge about the world – a world in which neither religion nor science is certain.

Philosophy for busy people. Listen to a succinct account of the philosophy of Kierkegaard in just one hour.Although Kierkegaard was not a philosopher in the academic sense, he produced what many people expect of philosophy. He didn’t write about the world, he wrote about life – how we live and how we choose to live, particularly focussing on the individual and the notion of his (or her) existence.

Philosophy for busy people. Listen to this succinct account of the philosophy of Plato in just one hour. Plato is still seen by many as the greatest of all philosophers, inspiring many of the finest thinkers through the ages. Indeed, many see all later philosophy as nothing but attempts to answer the questions he raised. He founded the Academy, the world’s first university, in 387 BC and taught that the physical world is not reality but rather a reproduction of the true source.

Philosophy for busy people. Listen to this succinct account of the philosophy of Rousseau in just one hour. In Rousseau we encounter a walking ego, a naked sensibility - his arguments are both deeply stirring and deeply inconsistent. Yet whilst his contemporaries Kant and Hume may have been superior academic philosophers, the sheer power of Rousseau’s ideas was unequalled in his time. It was he who encouraged the introduction of both liberty and irrationality into the public domain, lamenting how ‘man is born free but everywhere he is in chains’. This audiobook is an expert account of Rousseau’s life and philosophical ideas - entertainingly written and above all easy to listen to. Also included are selections from Rousseau’s work, suggested further reading, and chronologies that place Rousseau in the context of the broader scheme of philosophy.

Philosophy for busy people. Listen to a succinct account of the philosophy of Russell in just one hour. Bertrand Russell claimed to be driven by three great passions that drove his personal as well as his intellectual life: a longing for love, a quest for knowledge and a heart-rending pity for human suffering. His philosophical outlook, which took deep account of the science of his time, was nonetheless rooted in logic and empiricism.

Karl Marx's philosophical critique of capitalism and his solution of communism directly led to the formation of the communist state in the Soviet Union. Whilst this great venture has now all but completely failed, Marx’s philosophy has proved to be arguably the most influential of the 20th century; the influence of Marxism can be seen in subjects as diverse as the infamous policies of Joseph Stalin to many of the progressive humanitarian reforms of the 20th century. The audiobook is an expert account of Marx’s life and philosophical ideas - entertainingly written and above all easy listening.

Philosophy for busy people. Listen to this succinct account of the philosophy of Socrates in just one hour. Socrates is widely renowned as one of the founders of Western philosophy, despite the fact that his ideas survive largely through the work of his pupil Plato. Socrates’ dialectic – a method of aggressive questioning – was the forerunner of logic; he used it to cut through the pretentions of his adversaries and arrive at the truth.

Michel Foucault had already written extensively about medicine, madness, and prisons. But in the latter days of his career, he turned to the subject of sexuality, planning six volumes on the subject. He completed three before dying of an AIDS-related illness in 1984. Foucault's History of Sexuality Vol. 1 is a study of the evolution of cultural ideas about sex in the West since the end of the 17th century. Volume two looked at attitudes toward sex in ancient Greece; volume three investigated sex in ancient Rome.