"On a freezing December night almost two centuries ago, a fire erupted in lower Manhattan. The city's inhabitants, though accustomed to blazes in a town with so many wooden structures, a spotty water supply, and a decentralized fire department, looked on in horror at the scale of this one. Philip Hone, a former mayor of New York, wrote in his diary how "the progress of the flames, like flashes of lightning, communicated in every direction, and a few...