A periodicity of about 500 years has been discovered in the history of Graeco-Roman and Chinese historiography and documented by means of inferential statistics. Great historians emerged periodically and synchronously in both cultural areas for at least two millennia or longer, although no liaison between historians in the West and Far East is known. It is a surprising fact that this periodicity as well as the times of maximum creativity have been foretold by Babylonian priests, who knew about this rhythm already before 600 B. C. What is the cause of this periodicity and synchronicity is an open question.
Páles, Emil and Mikulecky, Miroslav Sr.
"Periodic Emergence of Great Historians in the History of Ancient Greece, Rome and China,"
Comparative Civilizations Review: Vol. 54
, Article 6.
Available at: http://scholarsarchive.byu.edu/ccr/vol54/iss54/6