" Here’s the Stanford University researcher Rosamond Naylor, who conducted some of the most recent calculations: “I think what startled me the most is that when we looked at our historic examples there were ways to address the problem within a given year. People could always turn somewhere else to find food. But in the future there’s not going to be any place to turn.”61 It doesn’t get any more basic than that. "

― Bill McKibben , Eaarth: Making a Life on a Tough New Planet