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The Dark Age of Greece
Among early civilizations, we call the low points "dark ages", because civilizations often dropped to such a low level that it is hard to get an accurate picture of their history during these periods. During a dark age, a civilization may not have produced monuments, statue, or other objects which we use to learn about early civilizations.
One' of the most important dark ages was the dark age of Greece,which lasted from about 1100 BC to 900 BC. Prior to-that-time,Greece had a highly advanced society called the Mycenaean civilization. The Mycenaeans were a trading civilizationIn fact, the Mycenaean civilization was so important that when it collapsed in the 12th centuryBC,most other civilizations in the region collapsed as well.The next 200 years are like a blank page to  historians and we know very little about this period.The collapse of the Mycenaeans brought an end to writing in the area, and thus an end to the written records historians rely on.
The little that we know about this period has been learned from archaeology. It seems that civilization became much less advanced. The pottery from this period is much simpler and less artistic. This suggests that there was lack of wealthy people to buy higher quality products.    This would suggest a large decrease in population, possibly due to a widespread lack of food and consequent starvation.
Sometime around 800 BC, the Greeks began to emerge from this dark age, most probably due to the influence of other civilizations. They had lost their early writing system, but began to use the writing system of the Phoenicians at this time.Over the next 300 years, their civilization continued to rise, and their dark age was forgotten.

A．Many civilizations undergo a series of high points and low points during their history.

B．Many early civilizations underwent dark ages, but Greece never recovered from its dark age.

C．They began constructing larger cities and trading with their neighbors again.

D．Another interesting point is that most of the large cities of earlier time periods appear to have been abandoned in favor of much smaller settlements.

E.Many pieces of evidence suggest that there was a huge increase in population during the dark age of Greece.
F.and they did much to spread their culture across the eastern Mediterranean.
G.One major reason for this is that writing basically stopped.