Book excerpt: A History of American Tonalism: 1880-1920 will change standard theory on American art history with a new paradigm that places the origins of American modernism in the late 1870s. Crucially, it also demonstrates how the Tonalist movement became the driving force in the development of a distinctly American art form: mystic, visionary, and nostalgic, yet essentially modern in its progressive dynamic of non-narrative abstraction--a fundamentally expressive and symbolic art that set its seal on American art then and now. --Book Jacket.