I think it's safe to say both are true. In general, we live in a healthier world. We know more about nutrition, cancer-causing chemicals, etc. We continue to

I think it's safe to say both are true. In general, we live in a healthier world. We know more about nutrition, cancer-causing chemicals, etc. We continue to make progress automating some of the most body-breaking jobs. Most of us (western world, anyways) have access to clean water. But, a substantial portion of the US (and world?) population is making bad decisions about their diet which have life-altering side-effects like diabetes. The question then is "why?" We know a lot about nutrition and it's impact on our bodies. Is it advertising? Is it cost (McDonalds is more sometimes more affordable on a time+money basis than home-cooked food)? Is it just our tiny lizard brains REALLY like salt and sugar and Nestle etc know how to manipulate that?