Answer:
Ariel as his name suggests is a spirit, ethereal, while Caliban is gross and bestial. Both are connected to the witch Sycorax who ruled the island before Prospero: Ariel was imprisoned by her, before being rescued by Prospero, while Caliban is her offspring. Both are servants of Prospero.
Foundation for the Founding Fathers and the First Principles
The Founding Fathers drew heavily upon English philosopher John Locke in establishing America's First Principles, most notably the recognition of unalienable rights, the Social Compact, and limited government.