Not quite as good as "The Story of Stuff", but still a pretty good survey of the situation and not a bad starting place to learn about food issues.http://usc-canada.org/storyoffood/
For a more in-depth understanding re: food sovereignty, corporate agribusiness (inclusding GMOs), and land grabs in 2nd and 3rd world countries .... La Via Campesina is an international peasant movement who's aim is to promote sustainable peasant and family farm agriculture as a way to feed the world.
"With the number of hungry people in the world at almost 1 billion, it is clear that the current food system blatantly fails in providing healthy and adequate food for all. The recent increase in land grabbing is an integral part of the dominant corporate agribusiness model with large-scale industrial monocultures." http://viacampesina.org/en/