Chronological or Thematic?

modis_wonderglobe_lrg
Last spring I was approached by an editor at a major academic publisher and invited to propose a new American Environmental History textbook. I had been shooting my mouth off a bit about how I didn't think there was a really good undergraduate generalist textbook. There are plenty of books for history majors, and there's a wide "historiography" for grad students. And there are also a number of good popular histories that deal with an particular period or issue. But there really isn't a comprehensive synthesis of American History from an environmental perspective.

The editor apparently got wind of this (I mentioned it to a sales rep at his press who passed it along), and invited me to put my money where my mouth was. Interestingly, he was the editor who had managed (and some say who had commissioned) the book that's most often used in undergraduate courses, which I had criticized. So I worked up a proposal and he critiqued it. Then I revised it a bit and he sent it out to five reviewers.

The reviews came back mixed. A few people said they would definitely use my book, a couple said they wouldn't. All gave detailed criticism which is extremely valuable as I redesign the course for this coming semester and rethink the textbook. And, most interesting, all agreed that a general textbook was badly needed in American Environmental History.

One of the issues the editor and one or two readers challenged me on was whether I was going to go with a chronological or a thematic approach. When I taught the course, it was a little of both. There's definitely a chronological element -- the material begins in prehistory and ends in the present day. But there are also several themes we keep coming back to. So as I redevelop the course material for this semester, I'm going to try to be more explicit about this. Or at least to think about it and try to reconcile it for myself, even if it ends up in the background and isn't in sharp focus for the reader.

My gut feeling is that I should stick with the chronological approach. What do other readers think?