https://en.wikipedia.org/wiki/Maunder_Minimum
Maunder Minimum is associated with famines, social upheaval,political turmoil and wars as crops fail due to less solar output.
Next Maunder Minimum approaches us earthlings by 2025-2030 roughly.
Last Maunder Minimum occured during 1645 and 1715 and it will repeat in a 350(plus minus) year cycle
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