The vast and complex topics of agriculture, corporate law, trade and patents on plant varieties defy a brief explanation, but it is sufficient to point out that a general trend and consistent policy may be seen in these and other domains. In these agreements there are volumes of fine print that regulate the minutest details of commercial activity, including agriculture. By virtue of their sheer economic power, agribusiness giants such as Monsanto have sharply tilted the economic playing field in their favor. Localized farmers in the Third World are just another field of conquest for these corporate marauders. Farmers who can't or won't participate will be forced out of farming by a number of introduced factors including the Terminator.
Food is power.
We use it to change behavior. While economics provide the footing for globalization, it is not the end itself. The end is control. To properly understand the means one must first understand the end. A farmer who doesn't borrow money and plants his own seed is difficult to control because he can feed himself and his neighbors.