Marc
Donor
An interesting question with only a drawled possible as the best answer. We actually have quite a bit weather data for the region. We know that Anatolia experienced a major drought in 1037 C.E, and the 10th through 11th centuries had a series of harsh winters (true through a great deal of the Eastern Med) and that means shorter growing seasons and difficulties with various kinds of crops. However, even earlier, agriculture in Anatolia was changing towards more pastoral farming and cereal production, and a lower overall level of agriculture, which would have been naturally reducing population density, particularly in the highland interior even prior to the invasions and migrations by the Turkic peoples.I seem to remember some thread/article that blame lost of Anatolia to some plague or climate change that make nomadism much more effective in highland and reduce number of farmers in plateau ?