Two chairs
In 1924 a Russian scientist mapped sunspot peaks onto centuries of riots and wars; he was later sent to the camps. The sun reaches Earth's grid; whether it reaches a crowd is less settled.
In 1924, Alexander Chizhevsky published Physical Factors of the Historical Process, matching sunspot cycles against roughly 2,400 events from 500 BCE to 1922 CE, and found most clustered near sunspot peaks. He was arrested under Stalin in 1942. Solar storms provably hit power grids — one blacked out Quebec in 1989. Do they also move crowds?
What's checkable: Chizhevsky's 1924 study, his 1942 arrest, and the 1989 Quebec blackout, a real geomagnetic event. What isn't: that solar storms move crowds the way they move current. Heliobiology remains contested and unproven.