Vandana Shiva is one of the most inspiring thinkers and speakers on the subject of food sovereignty, which refers to the right of all people to control their sources of food according to their own social, cultural, and political needs and not according to the requirements of transnational corporations.
This article, an excerpt from Shiva’s 2008 book Soil Not Oil: Environmental Justice in an Age of Climate Crisis, is a great introduction to her thought. The core of it is in this paragraph:
We need an alternative. Biodiverse, organic farms and localized food systems offer us security in times of climate insecurity, while producing more food, producing better food, and creating more livelihoods. The industrialized, globalized food system is based on oil; biodiverse, organic, and local food systems are based on living soil. The industrialized system is based on creating waste and pollution; a living agriculture is based on no waste. The industrialized system is based on monocultures; sustainable systems are based on diversity.
And if you just can’t get enough of Vandana Shiva, here is a talk she gave back in March of 2007, titled “Defending Food Freedom in a Period of Food Fascism”. Unfortunately, the links to the video files appear to be broken, but there is a working link to the audio.