It has become much harder, in the past century, to tell where the garden leaves off and pure nature begins.

Eat foods made from ingredients that you can picture in their raw state or growing in nature.

Corn is the hero of its own story, and though we humans played a crucial supporting role in its rise to world domination, it would be wrong to suggest we have been calling the shots, or acting always in our own best interests. Indeed, there is every reason to believe that corn has succeeded in domesticating us.

Another day it occurred to me that time as we know it doesn't exist in a lawn, since grass never dies or is allowed to flower and set seed. Lawns are nature purged of sex or death. No wonder Americans like them so much.

American farmers produced 600 more calories per person per day in 2000 than they did in 1980. But some calories got cheaper than others: Since 1980, the price of sweeteners and added fats (most of them derived, respectively, from subsidized corn and subsidized soybeans), dropped 20 percent, while the price of fresh fruits and vegetables increased by 40 percent.

Seeds have the power to preserve species, to enhance cultural as well as genetic diversity, to counter economic monopoly and to check the advance of conformity on all its many fronts.

People eating the western diet of heavily processed food, of lots of meat and added sugar and added fat, and very little whole grains and fruits and vegetables.Populations who eat that way have seriously high incidences of chronic diseases.