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- Far from being constant local climate and planetwide climate has changed over the relatively short term.
- The simple idea is 1. that local climate is in some kind of balance and never changes. 2. Any change in climate will be entirely negative
- The Tony Robinson Channel 4 programmes "Man on Earth" gave examples of ancient cities across the world at different times which
had to be abandoned proving that although local climate seems to be constant over the relatively short term of the 10-50 cycle over the 100-1000 year term big changes have always occurred. - The examples included the old Turkish Black Sea farming area being flooded when the glaciers melted eventually causing enough flow to break the barrier to the Mediterranean, and then this sea flowed back the other way.
- also 1300 years ago Yucatan city, 3000 years ago a place which went from being a lake to desert in 100 years, Mesa Verde in Arizona, the mini ice age Greenland (where the farming Vikings didn't survive and the hunting Inuit did), the medieval famine caused by the year of no summer (Krakatoa Volcano super eruption ) , the Pre-Inca Huari (Wari) civilization etc. etc.
- It also brought up the idea that catastrophe brings about positives e.g. While in places like Russia normal men remained as serfs enslaved to the rich in the UK the black death caused a decrease in population and therefore labour supply meaning common men were elevated to the become paid workers ... Therefore kickstarting the industrial revolution.
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