
Tchijevsky Physical Process of the Historical Process
PDF Tchijevsky Physical Factors of the Historical Process
Edited version with corrected scanning errors: Physical Factors of the Historical Process
First published in 1914. Tchijevsky discovered that 60 % of all historical event involving high social excitably, wars, revolutions, take place during 3 years of solar maximum within the 11- years- solar cycles (Schwabe cycles).
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