The World According to Monsanto is a good documentary about the rise of a corp in our reality that focuses on genetically altered crops, livestock, feed for said livestock and crops, and pesticide for their crops. They have cornered the market for what they do. Creepily so.
It is a good one to check out for fun SR food runs. Poisoning a seaweed farm off of the sound near Seattle may give them some hard cred, but some digging reveals who they are denying the food from: Horizon's Help A Child foundation. How do people run against Horizon?