The following is an excerpt from The Book of Macrobiotics - The Universal Way of Health and Happiness, by Michio Kushi, 1977.
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The developmental of world history has described an inward moving logarithmic spiral, alternating between the yang peiods of the concentration of the territorial power and the yin periods of universalization of the idea. /.../
Each period is approximately one-third as long as the previous period. In other words. each period changes with three times the speed of the previous period. (A logaritmically acceleration)."Now because it may be difficult to read the original figure I have done a table with the essential text.
