“At this point, a social flaw that always existed with regard to the [Roman] aristocrats in their townhouses became more evident. No longer finding urban life as secure and amenable as in the early empire, the landed rich gave primacy not to their urban mansions but to their country estates, making the latter their principal residences. The dominant forces in urban life increasingly became the bishops and cathedral clergy.”

“[Roman] society became steadily more cosmopolitan. By 212 A.D., all inhabitants of the empire, except for slaves, were deemed to be citizens. The old Roman aristocracy was not fixated upon race and color. Wealth and literacy were what opened the doors of their urban mansions and country villas.”

“The Fathers of the American Constitution, well-versed in the classical heritage, consciously constructed an awkward governmental system like republican Rome's: much better at blocking change than facilitating it. By the early twenty-first century, the ambiance of American urban life resembled that of the Roman Empire's cities, with lavish displays of wealth standing alongside cruel poverty, although average life expectancy in the Roman Empire never rose above forty years, while in 2003 United States it's in the mid-seventies.”

“We will never solve the problems of cities unless we like the urban-ness of urban life. Cities aren't villages; they aren't machines; they aren't works of art; and they aren't telecommunications stations. They are spaces for face to face contact of amazing variety and richness. They are spectacle - and what is wrong with that?”

“...I have come to be convinced that it is only the unbending observance of custom that sustains life in an urban circumstance.”

“Climate change. Urbanization. Biotechnology. Those three narratives, still taking shape, are developing a long arc likely to dominate this century.”