A majority of Americans believe in angels, but what are they? Where did the idea of angels come from? John Hamer of Toronto Centre Place looks at the history of angels in the Western tradition. He will also take a deep dive into the way Medieval philosopher discussed angels. Although ridiculed by later thinkers in the Enlightenment for pondering abstruse questions like “how many angels can dance on the head of a pin,” Medieval thinkers actually used the idea of "angels" in thought experiments about philosophical questions like free will and determinism that are still relevant today.