The answer to that depends on one's perspective of history.
Suggest the Civil War re-defined our nation, as it confirmed
Southern decline and its agrarian/rural focus as well as Northern
ascendancy w/its industrial focus.
Yet perhaps more critically, that change caused
culture/society to de-emphasize the spiritual and promote
the material, as economic well being became an end in itself.
Is Trump's governance taking us back to pre-Obama and Bush? If so; so what???
Or is he taking us back to Founders such as Jefferson, Madison and Monroe???
The perspective of plain people about change will give us the answer.