>https://judithcurry.com/2016/09/20/impact-of-the-2400-yr-solar-cycle-on-climate-and-human-societies/
Thank you. Some important pieces of the puzzle here:
"there is very solid evidence that periods of low solar activity in the past, identified by a higher rate of cosmogenic isotopes production, have a high degree of correlation with periods of climate deterioration manifested as lower temperatures and precipitation changes."