In 1859, Samuel Butler, a young Cantabrigian out of joint with his family, with the church, and with the times, left England to hew out his own path in New Zealand. At the end of just five years he returned, with a modest fortune in money and an immense fortune in ideas. For out of this self-imposed exile came Erewhon, one of the world's masterpieces of satire, which contained the germ of Butler's intellectual output for the next twenty...