Final answer:
The 1890s American expansion is a continuation of the manifest destiny concept from the 1840s, moving from continental expansion to overseas imperialism. Racial uplift ideology during the nineteenth century reflects a theme of self-determination and progress within the country. The Uncompahgria Uplift mentioned seems to be a mix-up and unrelated to the question.
Step-by-step explanation:
To what extent was American expansion in the 1890s a continuation of manifest destiny in the 1840s? The concept of manifest destiny in the 1840s was the belief that the expansion of the United States throughout the American continents was both justified and inevitable. The expansion during the 1890s can be seen as a continuation of this ideology, albeit with different mechanics and a shift from continental expansion to overseas imperialism. American expansion in the 1890s, marked by events such as the Spanish-American War and the annexation of Hawaii, showed the U.S. exerting its influence and control beyond its continental borders, driven by economic interests, strategic concerns, and a sense of national superiority.
The earlier Uncompahgria Uplift is not directly related to the sociopolitical concept of manifest destiny but may have been a geological event or a term from a different context altogether. Therefore, it would seem there has been a mix-up in the question being addressed.
Racial uplift ideology and the building of self-sufficient Black communities during the nineteenth century can illustrate how the overarching theme of self-determination and progress was also present within the United States, separate from territorial expansion. These communities were a form of internal uplift and autonomy, whereas manifest destiny usually pertains to external territorial expansion and dominion.