When men do not run they are likely to die prematurely from dysfunction of the heart and vascular systems or from disabling chronic disease.

The natural world is not only a set of constraints but of contexts within which we can more fully realize our dreams.

The human cardiovascular system evolved as part of the physiology of [prehistoric] hunters, who ran for their lives.

When men do not run they are likely to die prematurely from dysfunction of the heart and vascular systems or from disabling chronic disease.

Careless of waste, wallowing in refuse, exterminating the enemies . . . despising age, denying human natural history, fabricating pseudotraditions, swamped in the repeated personal crises of the aging preadolescent; all are familiar images of American society. They are signs of private nightmares of incoherence and disorder in broken climaxes where technologies in pursuit of mastery create ever-worsening problems - private nightmares expanded to a social level.

There is a secret person undamaged in every individual.

Men are born human. What they must learn is to be an animal. If they learn otherwise it may kill them, and kill life on the planet.