We have left dry land and put out to sea! We have burned the bridge behind us - what is more, we have burned the land behind us!

Nietzsche's devastating demolition of religion would have seismic consequences for future generations. With God dead, he envisages a brilliant future for humanity: one in which individuals would at last be responsible for their destinies.

GREAT IDEAS. Throughout history, some books have changed the world. They have transformed the way we see ourselves - and each other. They have inspired debate, dissent, war and revolution. They have enlightened, outraged, provoked and comforted. They have enriched lives - and destroyed them. Now Penguin brings you the works of the great thinkers, pioneers, radicals and visionaries whose ideas shook civilization and helped make us who we are.