Recent events in Chicago exemplify a trend in historic preservation: “the far past gets saved; the recent past gets trashed.” Even as officials were announcing millions in city funds to restore some Louis Sullivan-designed ornamental ironwork on State Street, “wrecking crews were tearing into a little-noticed modernist gem in Pilsen: the Emmanuel Presbyterian Church … designed by the late architect Edward Dart.” Of course, when Sullivan belonged to the more recent past, his work was demolished, too….