Described as a bit of a broadside against Garry Wills’ earlier book on the subject, rather than situate the Declaration within a pan-European intellectual environment, with special attention to the ideas of the Scottish Enlightenment, Maier is more interested in a strictly American context. The state and local proclamations that preceded it, for example. She is not terribly interested in the philosophical background of it (though she is interested in the philosophical implications).
If I’m honest, I found Wills to be a better writer. This is partly because I wasn’t too interested in the straight revolutionary history that makes up the first third or so the book.