Fischer's thesis is that the culture and folkways of each of these groups persisted, albeit with some modification over time, providing the basis for the four modern regional cultures of the United States.
费舍尔的理论是，这些族群的文化和习俗是会持续的，尽管随着时间会有一些改变，这为美国四种现代地域文化打下了基础。