Pluto last occupied the sign of Aquarius between 1778 and 1798. The French, American, Haitian, and Industrial Revolutions all took place during this period.
Additionally, the Age of Enlightenment was in effect at the time, emphasizing the superiority of reason and science over faith and superstition.
Numerous social hierarchies were overthrown during this time, and there was strong opposition to authority.
The invention of the parachute, sewing machine, smallpox vaccination, and hot air balloon also signaled a time of immense imagination.