For most of human history, unusual behavior had only one explanation: demonic possession.

Convulsions, strange voices, personality changes, and unexplained visions were often interpreted as evidence that a spirit had entered the human body. Long before psychiatry or neurology existed, religious communities developed rituals such as exorcism to confront what they believed were supernatural attacks.

In this episode, we explore the historical roots of demonic possession in medieval Europe, the language used to describe "demoniacs," and the development of early exorcism practices. From medieval texts and religious doctrine to modern discussions about psychology and mental illness, the history of possession reveals how societies attempt to explain behaviors that feel frightening or unfamiliar.

Possession narratives have never completely disappeared. They continue to shape popular culture through stories of haunted houses, cursed objects, and supernatural influence.

But looking back through history raises an unsettling question.

How many demons were created by the human need to explain the unknown?

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