Original sentence: While the development of modern American liberalism may be traced to the late 19th and early 20th century, it may also be viewed as the modern version of the classical liberalism upon which America was founded
Edited sentence: While the development of modern American liberalism may be traced to the late 19th and early 20th century, some view it as a modern version of the classical liberalism upon which America was founded, while some others disagree that it sprang from classical liberalism and see it as a rejection of its principles