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 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.

Philosophy for busy people. Listen to this succinct account of the philosophy of Descartes in just one hour. Descartes was the first modern philosopher. His scepticism led him to doubt all certainties, until finally he arrived at his famous maxim 'I think therefore I am'. He would also apply his rationalism with great effect in science and mathematics, conceiving a scheme for scientific method and inventing Cartesian co-ordinates in geometry.

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. Read a succinct account of the philosophy of Spinoza in just one hour.Spinoza’s brilliant metaphysical system was derived neither from reality nor experience. Starting from basic axioms (assumptions), by means of a series of geometric proofs he built a universe which was also God – one and the same thing, the classic example of pantheism.

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. Read a succinct account of the philosophy of Leibniz in just one hour.Leibniz was the first great German philosopher to produce an all-embracing philosophical system. He came to the remarkable conclusion that space and time do not exist – they are mere superstitious assumptions. Only things exist and only God is able to see things as they truly are – from a perspectiveless viewpoint. Yet the infinite of ultimate objects that make up the world (‘monads’) are not material: they are metaphysical and thus not subject to the laws of cause and effect.

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.

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 Locke in just one hour. Much of Locke’s thought we would now regard as common sense. One of the most influential of Enlightenment thinkers; his philosophy was to lay the foundations of empiricism with its belief that our knowledge of the world is based on experience. Locke’s work introduced the idea of liberal democracy – a concept that has become the shibboleth of Western civilisation.

Philosophy for busy people. Listen to a succinct account of the philosophy of Berkeley in just one hour.Berkeley’s philosophy denies the existence of matter. According to his work, there is no material world, only our own experience. So when you don’t see something, it isn’t there. Then how does the world persist? Because it is supported by the continuous perception of an all-seeing God. Berkeley’s ideas appear to take empiricism to a ludicrous extreme. But is this quite so absurd as it seems?

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.

Augustine’s Confessions details his personal struggles with morality, his spiritual crisis and the conversion to Christianity that ultimately led him to his major contribution to philosophy: the fusion of the doctrines of Christianity and Neoplatonism. This provided Christianity with a strong intellectual backing by tying it to the Greek tradition of philosophy. Augustine also produced important philosophic ideas of his own, including theories of time and subjective knowledge that anticipated by many centuries the work of Kant and Descartes.

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.