Tremors of History

: It is a cruel and poignant certainty that the children who died in the wreckage of their school during the earthquake this week in Dujiangyan, China, knew all too well that their country once led the world in the knowledge of the planet’s seismicity.

They would have been taught, and proudly, that almost 2,000 years ago an astronomer named Chang Heng invented the world’s first seismoscope. It was a bizarrely imagined creation, with its centerpiece a large bronze vessel surrounded by eight dragons, each holding a sphere in its mouth.

A complex system of internal levers ensured that if an earthquake ever disturbed the vessel, a ball would drop from a dragon’s care into the mouth of a bronze frog positioned underneath. By observing which dragon had dropped its ball, Chang Heng could ascertain the location of the quake. And always, as the emperor for whom Chang Heng fashioned the device noted, the earthquakes came from the mountains in the west, where Dujiangyan lies.

As we watch with mounting melancholy the devastation from Sichuan, a question lingers, and troublingly. Why, if the Chinese had come to know so much about earthquakes so early on in their immensely long history, were they never able to minimize the effects of the world’s contortions — to at least the degree that America has? Why did they leave the West to become leaders in the field, and leave themselves to become mired, time and again, in the kind of tragic events that we are witnessing this week?

And yet, in the 16th century China’s innovative energies inexplicably withered away, and modern science became the virtual monopoly of the West. There had been any number of Chinese Euclids and Archimedes but there was never to be a Chinese Newton or Galileo. The realm fell steadily behind, century by century; it became impoverished, backward and prey to...