For hundreds of years, Africa has existed in a state of despair. Famine, civil wars and rampant disease have left the continent without hope, but for the efforts of Western do-gooders. At first, they arrived with food, bibles and the magic of penicillin; more recently they have hosted rock concerts and sent plane loads of grain. And in the last decade of the 20th century they arrived and took babies home with them. First there was Angelina, then Madonna,...