Some years ago, when I stepped from an unstable boat onto Juan Fernández island, a friendly man took my bag and introduced himself as Robinson. Ten minutes later, I found a room to rent. The homeowner’s first name was Crusoe. Get the idea? Although Defoe set his story hundreds of miles away, near the mouth of the Orinoco, Juan Fernández was where the real Crusoe, the Scottish sailing master Alexander Selkirk, spent four years and four months in the company only of goats.