1897 – 1964 · A portrait
A Soviet biophysicist who compared over two thousand years of wars and revolutions against the eleven-year sunspot cycle, and argued solar activity drove waves of mass unrest.
The line above is how his claims were received — by the scientists whose job was to doubt them. It rises as a claim is tested and accepted, and the room brightens with it. It is not a verdict on truth: some accepted ideas are later overturned, and some rejected ones come back.
In a 1924 book he tallied wars, revolutions and epidemics across roughly 2,400 events since 500 BCE in dozens of countries, then compared the pattern to the eleven-year sunspot cycle, claiming about 80% clustered near solar maximum.
His views sat uneasily with Soviet orthodoxy. He was arrested in 1942 and spent years in a labor camp and in exile before being cleared decades later.
Economist Edward Dewey re-examined the data and found that, in Chizhevsky's own figures, the peak of mass unrest actually lagged the sunspot peak by about a year — a timing gap that weakens the claim of direct solar causation.
Heliobiology, the field he founded, remains on the fringe of science; later analyses have not confirmed the fuller claim, and the eleven-year rhythm's cause is still an open question.