A belief in Manifest Destiny is most closely associated with the decision to expand the United States westward across North America in the 19th century. This ideology justified territorial acquisition, including the annexation of Texas and the Oregon Trail migration, as a divine right and a moral obligation. It fueled conflicts with Indigenous peoples and other nations, such as Mexico, culminating in events like the Mexican-American War. Ultimately, Manifest Destiny played a significant role in shaping America's national identity and territorial boundaries.
James Polk
James Polk A+ learining :)
Although manifest destiny is most closely associated with the territorial expansion of the United States from 1812 to 1860, it has been used in more modern times as well. President McKinley invoked the idea of manifest destiny when advocating for the annexation of Hawaii.
Mexico had claimed Texas. The US wanted Texas, arguably because many Americans believed in Manifest Destiny-- we were 'entitled' to lands from ocean to ocean. If America had not already worked out eastern Canadian-US boundaries in the French and Indian War, and if the French had not strongly set up control over Canada, Americans probably would have pushed north, too, under Manifest Destiny. Once the US took over Texas, the US stopped pushing further south.
Worcester V. Georgia (1832)
Worcester v. Georgia (1832)
Beta waves are closely associated with mental activity as they are present during normal waking consciousness, problem solving, decision making, and concentration. They are generally associated with active thinking and focus.
I've encountered the phrase 'manifest humanity' a few times before, generally in the context of futurism or speculative fiction. The phrase can be most closely associated with the late 1900s American 'manifest destiny' which suggested that (white, Anglo-Saxon, Protestant) Americans should expand the United States from the Atlantic to Pacific ocean, and including Canada, Mexico, and Central America in some cases and realize the "destiny" of the US.'Manifest Humanity' suggests the realization of humanity's potential. In many contexts this means much greater space exploration, technological development, and in some contexts greater international cooperation and improving the minimum standard of living. Manifest Humanity can also (in a speculative fiction usage) refer to a policy more in line with the genocidal undercurrent of 'manifest destiny' suggesting that Humanity should conquer everything it may encounter in space by any means necessary. "Manifest sentience" would be a sort of combination of the two, suggesting that sentiences (humans, machine intelligences, aliens, etc.) should better themselves.
Frederick Douglass was closely associated with abolition.
Government is most closely associated with imperialism.
Natural selection is what is most closely associated with Darwin.
The single main concept of Manifest Destiny is the principle that the United States was clearly fated, even by God, to expand across the entire North American continent. The obvious problem with Manifest Destiny (which, it may be argued, continues to the present day as the United States seeks to export what we characterize as "democracy" around the world) is that there may be other people, cultures and ideas in the way. Manifest Destiny ultimately includes so many concepts that we should refer you to the excellent Wikipedia article in the related link below. You can use this as a starting point, but be sure to look at the references and further reading list. This is a deceptively huge subject. Geography