From Michael Pollan's open letter to the next Farmer in Chief:

"the deeper reason you will need not simply to address food prices but to make the reform of the entire food system one of the highest priorities of your administration: unless you do, you will not be able to make significant progress on the health care crisis, energy independence or climate change."

http://www.nytimes.com/2008/10/12/magazine/12policy-t.html?pagewanted=1&_r=1&em