• The great virtue of a diversified food economy, like a diverse pasture or farm, is its ability to withstand any shock. The important thing is that there be multiple food chains, so that when any one of them fails-when the oil runs out, when mad cow or other food-borne diseases become epidemic, when the pesticides no longer work, when drought strikes and plagues come and soils blow away-we'll still have a way to feed ourselves.

    Michael Pollan (2009). “The Omnivore's Dilemma: The Search for a Perfect Meal in a Fast-Food World”, p.134, Bloomsbury Publishing