Where Does “Panic” Come From? The Terror of the God Pan

The God of the Lonely Places

Pan was one of the stranger members of the Greek pantheon. Unlike the Olympians — Zeus, Athena, Apollo, seated in divine dignity — Pan was a creature of the margins: half-man, half-goat, associated with wild and lonely places rather than cities or temples. He governed flocks and shepherds, presided over wild nature, and was the patron of rustic music — he had invented the panpipes (the syrinx) by turning a river nymph into reeds. His domain was everywhere that civilization gave out: mountain paths, caves, forests at noon, the unmapped spaces between towns.

It was in these lonely places that Pan was dangerous. Greek travellers in remote areas were wary of disturbing the god, particularly at the midday hour when he was thought to sleep. If Pan was awakened — by the sound of footsteps in a rocky mountain pass, by a shepherd’s careless noise in a quiet valley — he could send sudden, overwhelming, irrational terror into whoever had disturbed him. The terror struck without warning and without clear cause. There was no visible threat, no rational explanation: only the sudden, visceral conviction that something terrible was about to happen, and the overwhelming urge to run.

Panic Fear: From Mythology to Vocabulary

The Greeks had a specific term for this experience: panikos deima — “Pan-ic fear,” the fear of Pan. The adjective Panikos (of Pan, relating to Pan) described the sudden, irrational terror that Pan caused. It was a recognised psychological category: the ancient equivalent of what we might now recognise as a panic attack or acute anxiety — sudden, physical, overwhelming fear without an identifiable cause.

The term passed into Latin as panicus (of Pan), and from Latin into French and English. The English “panic” first appears as an adjective — “panic fear,” “panic terror” — in the 1620s, describing sudden irrational fear without a clear cause. The noun “a panic” (a state or episode of such fear) appeared around 1708. By the 19th century, “panic” was used in financial contexts — a “financial panic” was a sudden irrational wave of fear in markets — and the medical term “panic attack” followed in the 20th century.

Through all these uses, the core meaning remained the same: sudden, overwhelming, apparently causeless fear. The god Pan, who caused such terror in lonely places, is present in every “panic” — every moment of irrational, uncontrollable fear that overtakes us in the night or in an empty street or in a crowd. The wilderness has moved inside, but the god’s name is still on the feeling.

Pan and the Battle of Marathon

The connection between Pan and actual military panic appears in one of the most famous stories of ancient history. Before the Battle of Marathon (490 BCE), according to Herodotus, the Athenian messenger Pheidippides encountered Pan on his run to Sparta asking for help against the Persian invasion. Pan reportedly asked why the Athenians paid him no honour, and promised his assistance in the battle. After the miraculous Athenian victory, the Athenians credited Pan with sending “panic” among the Persian ranks — causing them to flee in sudden, irrational terror that had no military explanation.

Whether or not the story is historically accurate, it shows exactly how the Greeks understood Pan’s power. A military rout caused by inexplicable terror was Pan’s doing. The god was actively useful as an explanation for the most common and most dangerous event in ancient warfare: the moment when an army, for reasons that no commander could identify, suddenly broke and ran. Pan’s panic was not just personal terror but the engine of military catastrophe.