I found this article regarding President Bill Clinton's dietary habits interesting. We spent a lot of time in class talking about what it would take to change the American food system. Directly tied to the American food system are peoples' dietary habits. For Clinton, it took a serious medical scare to catalyze dietary change. Hopefully the rest of us can find a less dangerous motivator for change.
http://www.cnn.com/2011/HEALTH/08/18/bill.clinton.diet.vegan/index.html