纪录片《大英博物馆世界简史》 013印度封印（4）

"When one's faced with a piece of ground where there is very limited constraints, there are not many buildings there and it's a sort of white piece of paper, the first thing you do is start putting a grid on it, because you want to own it and a grid is a way of owning it, a way of getting order. And architecture is really giving order, harmony, beauty, rhythm to space.

You can see that exactly in Harappa, that's exactly what they're doing - they were giving exactly those elements. And there's an aesthetic element with it, because you can see this from their sculpture and so on - they have an aesthetic consciousness, and they also have a consciousness of order, and they have a consciousness of economy, and those things link us straight over the five thousand years to the things that we are doing today."

As we saw in Egypt and Mesopotamia, the leap from village to city usually required one dominant ruler, able to coerce and deploy resources. But just who ran these highly-ordered Indus Valley cities remains unclear. There is no evidence for kings or pharaohs - or indeed for any leader at all. And this is largely because, both literally and metaphorically, we don't know where the bodies are buried.