This is a book about the invention of Western philosophy, and the first thinkers to explore ideas about the nature of reality, time, and the origin of the universe. Generations of philosophers, both ancient and modern, have traced their inspiration back to the presocratics, even though we have very few of their writings left. In this book, Catherine Osborne invites her readers to dip their toes into the fragmentary remains of thinkers from Thales to Pythagoras, Heraclitus to Protagoras, to try to fill in the bits of a jigsaw that has been rejigged many times and in many ways.