If you imagine an ordinary moment at an intersection in ‘‘London’’, and there is a pause because there is a streetlight,  and some people are stopped and others in motion, and some cars are stopped and others in motion; if you were to put that into film terms as a “freeze frame” and hold everything for a second,  you would realize that there’s a universe there of totally disparate intentions,  everybody going about his or her business  in the silence of their own minds,  with everybody else  and the street  and the time of day  and the architecture  and the quality of the light  and the nature of the weather  as a kind of background or field for the individual consciousness  and the drama that it is making for itself at that moment,  and you think about that, that’s what happens in the city, in that somehow the city can embrace and accept and accommodate all that disparate intention,  at one and the same time, not only on that corner, but on thousands of corners . . . .

E.L.Doctorow, introducing Ric Burns’ New York: A Documentary