Writing about the Midwest presents a problem unknown to those who write about, say, the South or New England. The problem is that no one can define, with any precision, just what the Midwest is.
I made a stab at it in my book on the Midwest, Caught in the Middle: America's Heartland in the Age of Globalism. I based my definition on what I could see and sense when I was doing my research. So I've been charmed, not to say gratified, to read a book that says that the Midwest exists as it is today because of the four great glaciers that rolled across the region, starting about a million years ago, and that this glacial expanse pretty much matches my impressionistic definition.
Geology, it seems, is destiny.
In my book, I defined the Midwest mostly as the eight states of the Upper Midwest -- Minnesota, Wisconsin, Iowa, Michigan, Missouri, Illinois, Indiana, and Ohio. But I made a point of cutting across state lines when it seemed appropriate, if only to stress how little these artificial political boundaries have to do with the reality of Midwestern life.