At Home: A Short History of Private Life

by Bill Bryson

However they did it, the Mesoamericans created the world’s first fully engineered plant—a plant so thoroughly manipulated that it is now wholly dependent on us for its survival. Corn kernels do not spontaneously disengage from their cobs, so unless they are deliberately stripped and planted, no corn will grow. Had people not been tending it continuously for these thousands of years, corn would be extinct. The inventors of corn not only created a new kind of plant, they also created—conceived from nothing really—a new type of ecosystem that existed nowhere in their world. In Mesopotamia natural meadows grew everywhere already, so cultivation was largely a matter of transforming natural grain fields into superior managed ones. In the arid scrubs of Central America, however, fields were unknown. They had to be created from scratch by people who had never seen such a thing before. It was like someone in a desert imagining lawns.