The Saturn-Neptune synodic period lasts 35.86 years. Between their conjunction, two squares, and an opposition take place, roughly every 9 years. The astrologer A. Barbault considered this to be the cycle which governs the development of socialism.
The examination of history (a period of 2632 years) in line with the Pluto-Neptune movements, establishes the view of the planetary duo Neptune-Pluto as pillars of the human economy,
The historical examples of the past four Neptune's transits through Pisces demonstrate a challenge of the established authorities by the masses. There is no evidence of direct and effective change but rather a gradual decay of outdated conditions that are gradually replaced by new ones.