After the Athenian victory over the Persians at Marathon in 490 BCE, legend says a runner carried the news to Athens, cried nenikekamen, we have won, and died. The problem: Herodotus, our main source, mentions Pheidippides only as the runner sent Athens to Sparta, 240 kilometers each way, and says nothing about a Marathon-to-Athens dash; the dying-messenger story first appears in Plutarch, six centuries later, quoting a lost work that names the runner Thersipus or Eucles. The first Olympic marathon ran in 1896, conceived by Michel Breal, won by water-carrier Spyridon Louis. The 26.2 distance dates to London 1908, stretched so the race could start at Windsor Castle and end before the royal box.
Marathon the place is named for marathos, Greek for fennel, the plant that grew on the plain. The epic origin of Western endurance sport is, botanically, a field of herbs. Browning's 1879 poem Pheidippides fused the Spartan run and the death scene into the composite everyone now knows, which is to say: the modern marathon's founding text is a Victorian poem, not a Greek history.
The claim: the marathon works as myth because the price is built in, the message is only worth running if the messenger dies, and the race sacralizes expenditure itself: you pay in the body what the ancients paid in a body. Verdict: the death is the load-bearing detail, without it the story is a jog. Civilizations pick their founding athletics the way they pick their founding battles, for the casualty that proves it mattered.
Why did civilization choose a probable myth as its official unit of endurance?