I think that it is very reasonable to think that many (most) things in the natural world have some sort of cycle. From the monthly cycles of a woman, the seasonal cycle of the seasons, to the cycle of climate change.
As your video noted - he surmises we are 500 years past due. I thought it was more than that, but obviously they are estimates.
The problems of a cool period (or an actual ice age) would be much worse than a temperature increase.
75 posted on 12/16/2017 8:29:57 PM PST by 21twelve
(http://www.freerepublic.com/focus/f-news/2185147/posts FDR's New Deal = obama)