Bertrand Russell changed Western philosophy for ever. He co-authored the infamous Principia Mathematica, the most difficult book ever written on the logic of mathematics. A pioneer in logical analysis, he was a resolute empiricist who tackled many puzzles - how our minds work, how we experience the world, and what the true nature of meaning is. And yet for much of his life he considered himself a complete failure. Introducing Bertrand Russell describes his philosophical arguments clearly and explains why some philosophers now disagree with them. We meet a passionate eccentric, an aristocrat with socialist and pacifist beliefs who was prepared to be imprisoned for them. He actively participated in world politics and encouraged protest against unjust governments. He was a deeply religious man who hated all organized religion, an advocate of women’s rights who married several times and had numerous affairs. His outspoken views on sex, marriage, religion and education scandalized many - and still can.