"Oil wells go dry and coal seams run out, but for the first time since the Industrial Revolution began we are investing in energy sources that can last forever." –Lester R. Brown, Plan B 4.0: Mobilizing to Save Civilization.
Geoffrey Lean's article 'One poor harvest away from chaos' in the The Telegraph cites Lester Brown: "the world is only one poor harvest away from chaos. We are so close to the edge that politically destabilising food prices could come at any time." Posted January 12, 2011.