The historian Arthur Schlesinger has pointed out that people...

The historian Arthur Schlesinger has pointed out that people tend to get interested in politics again every 30 years. The universe moves in cycles of three. The number figures in everything from Pythagoras's theory that the universe is based on three to the Father-the-Son-and-the-Holy- Ghost to the three-sided pyramidal shapes that intersect in the Jewish Star of David. The notion of the mystical three, metaphysically, spiritually, and even politically, is quite interesting to me.