One of the reasons we eat fast food is that we don't have to cook fast food. We are out-sourcing cooking to corporations, they tend to cook with far too much salt, fat, and sugar.

The issue of snacking is complicated. In principle, "grazing" is probably a good idea. It would even out the insulin spikes and things like that from eating large meals. The problem is it makes it harder for people to control the amount they're eating.

One surprise is how deeply the food system is implicated in climate change. I don't think that has really been on people's radar until very recently. 25 to 33 percent of climate change gases can be traced to the food system. I was also surprised that those diseases that we take for granted as what will kill us - heart disease, cancer, diabetes - were virtually unknown 150 years ago, before we began eating this way.

Eat only until you're 4/5 full. An ancient Japanese injunction.

Eating is a political act.

A natural historian is somebody who looks at something in terms of its relationship to the rest of the natural world. You look at things ecologically. When you see a cow on a feedlot, you don't just see a cow; you see a cow that is eating certain food. You follow that food and that food takes you back to a corn field.

A tension has always existed between the capitalist imperative to maximize efficiency at any cost and the moral imperatives of culture, which historically have served as a counterweight to the moral blindness of the market. This is another example of the cultural contradictions of capitalism - the tendency over time for the economic impulse to erode the moral underpinnings of society. Mercy toward the animals in our care is one such casualty.