Book excerpt: In City Life, Witold Rybczynski, bestselling author of Now I Sit Me Down, looks at what we want from cities, how they have evolved, and what accounts for their unique identities. In this vivid description of everything from the early colonial settlements to the advent of the skyscraper to the changes wrought by the automobile, the telephone, the airplane, and telecommuting, Rybczynski reveals how our urban spaces have been shaped by the landscapes and lifestyles of the New World.