A.L. Tchijevsky developed an Index of Mass Human Excitability by identifying in history the timing of such events as wars, revolutions, riots, expeditions, and migrations. He concluded that these events correlated with peaks in the 11 year sunspot cycle. We are just past the peak of sunspot cycle #24; this cycle was unusually weak. The next cycle, #25 should reach its peak in mid to late 2024, and could be a much more exciting cycle with the peak being more than twice as high as #24.
It is interesting to me that what Tchijevsky identifies as a more likely time for exaggerated mass human excitability coincides with the suggest timing for the violent period of the current Fourth Turning crisis period.
One highly important undercurrent at this time is the compound growth in the amount of energy expended to acquire more energy. This is occurring because we always pick the low hanging fruit first, leaving the rest for later. Each unit of energy acquired has a fixed amount of energy. When we must expend more energy to acquire that unit, less energy is available to drive economic output. In the past we have produced energy faster to compensate for the increased expenditure in the acquisition process. Obviously we can't rationally expend more energy than we acquire in the process, plus we are approaching geological , and physical limits on total production.
Here is one study that indicates that for oil, around 2030 we will reach the point where it takes more energy to acquire new oil deposits than is in the deposits acquired. The effect of this will destroy all industrial economies that are heavily dependent on oil, and we won't need to wait till 2030 for the ramifications on our society to be felt; no other energy source could possibly adequately substitute for the abrupt end of the oil age.
http://www.thehillsgroup.org/
Pay particular attention to this graph attached to this report:
http://www.thehillsgroup.org/depletion2_020.htm
Not only will we likely see financial, economic, and social collapse, but governments everywhere could be swept away by the combined effect of the rapidly contracting industrial age for want of sufficient energy to fuel it, the cyclical end of the Fourth Turning crisis period, and the exciting effect of high sunspot activity around 2024.