Check out this video of a TED talk from Mark Bittman. I think you will find it interesting. I don't agree with everything he says by any means but he has an interesting viewpoint on the ills of our modern food supply. He posits that one of the biggest problems with the world today is that we eat too much meat. This leads to health, and environmental problems. He gives a very quick history of modern food supply starting at about 7:40 in. My favorite quote that he gave was "We are not born craving whoppers and skittles."
Like I said, I don't agree with everything he says but I do think I would be better off eating less meat and processed foods. Marisa and I have already improved on this but we can do even better.
Now that you've seen Mark Bittman's opinion, share with us what you think is the biggest problem with what we eat in our modern society?