World History

From my friend John Terauds, an interesting article on History Today:

Today, it is taken for granted that ‘World History’ exists. Muslims, Jews and Chinese each have their own calendars and celebrate their own New Year’s Day. But for most practical matters, including government, commerce and science, the world employs a single common calendar. Thanks to this, it is possible to readily translate dates from the Chinese calendar, or from the Roman, Greek or Mayan, into the same chronological system that underlies the histories of, say, Vietnam or Australia.

This single global calendar enables us to place events everywhere on a single timeline. Without it, temporal comparisons across cultures and traditions would be impossible. It is no exaggeration to say that this common understanding of time and our common calendar system are the keys to world history.

It was not always the case. Most countries, cultures or religious groups have lived according to their own calendars. Each designated its own starting point for historical time, be it the Creation, Adam and Eve or some later event, such as the biblical Flood. Even when they acknowledged a common point in time, as did both Greeks and Persians with the birth of Alexander the Great, they differed about when that event took place.

More at the link, including the detail that it was the Persian scholar Abu Rayhan Muhammad al-Biruni (973-1039) who first attempted a universal scheme to harmonize all extant dating systems.

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