Founded in 1746, Princeton is the fourth-oldest university in the country. It has been called "a national treasure" and is considered by many to be the loveliest campus in America. The very word "campus" debuted there in the eighteenth century, and over time, Princeton's has ceaselessly evolved, passing through a series of distinct identities. Architectural critics have lavishly praised it, and careful stewardship by administrators and architects has preserved its appeal from generation to generation. Thousands of alumni return every year to march in the gaudy P-rade, which twists among...