“Charles Darwin’s dad nudged him into marrying in his perfectly nice, if plain, thirty-year-old spinster first cousin, Emma Wedgwood, and bought them a country place and settled enough money on him for the boy to live well forever and ever. Living well included eight or nine servants— a butler, a cook, a manservant or two, a parlor maid, a lady’s maid, and at least one nanny and a governess— from day one.”