“Distance running was revered because it was indispensable; it was the way we survived and thrived and spread across the planet. You ran to eat and to avoid being eaten; you ran to find a mate and impress her, and with her you ran off to start a new life together. You had to love running, or you wouldn’t live to love anything else. And like everything else we love—everything we sentimentally call our “passions” and “desires”—it’s really an encoded ancestral necessity. We were born to run; we were born because we run. We’re all Running People, as the Tarahumara have always known.”