Just see the land farmers revolutions, fighting industrial farming with new methods. Organic farming (the "bio" label), sellers collectives, Community Supported Agriculture (CSA). Previously they had to fight the big mills and banks, now the industry, the government and Monsanto just to keep the nature and ourself healthy.
There's a whole film festival for new farming http://www.mefarms.org/community-kitchen/food-farm-film-fest... with lots of recommendations.
"The Real Dirt on Farmer John" (my favorite) http://www.angelicorganics.com/ and esp. http://learngrowconnect.org/