William Penn was a relatively tolerant man when it came to religion, economics, and society--meaning that the basis for his settlement revolved around fair and equal treatment towards most people from different walks of life.
The mists allows a rain forest-like ecosystem adjacent to the falls and on the opposite cliff that faces them like a dried-up mirror image, thick with mahogany, fig, palm, and other species of vegetation.
The idea of equality was radical in the 1700s was because they felt like equality really needed to be found and used. Some people liked and disliked equality and everyone felt different about it.
Just do your usual studying and pace yourself.