Abolitionism is one of the many factors that lead to conflict between northern and southern states. This movement focused on getting rid of the institution of slavery. By emancipating (freeing) these slaves, Southern plantation owners would suffer a significant loss in profits, as slaves were not paid for their work.
This threat to Southern society caused them to rebel against this idea and any individual who supported it. This fear of freeing slaves ultimately lead in the secession of the Southern states, as the election of Abraham Lincoln in 1860 posed a serious threat to their way of life.
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Many government officials felt that Native Americans should be assimilated into America's mainstream culture before they became enfranchised. The Dawes Act of 1887 was passed to help spur assimilation. It provided for the dissolution of Native American tribes as legal entities and the distribution of tribal lands among individual members (capped at 160 acres per head of family, 80 acres per adult single person) with remaining lands declared "surplus" and offered to non-Indian homesteaders. Among other things, it established Indian schools where Native American children were instructed in not only reading and writing, but also the social and domestic customs of white America.
The Dawes Act had a disastrous effect on many tribes, destroying traditional culture and society as well as causing the loss of as much as two-thirds of tribal land. The failure of the Dawes Act led to change in U.S. policy toward Native Americans. The drive to assimilate gave way to a more hands-off policy of allowing Native Americans the choice of either enfranchisement or self-government.
For Lincoln, allowing American democracy to succeed was compatible with the ideal of freedom; allowing secessionists to destroy it (in response to a democratic election) was not. In other words, Lincoln did not believe that true freedom was letting states do their own thing--and letting the pillars of American constitutional democracy run amok--but instead, in maintaining a union where the great experiment of democracy could flourish. As Lincoln himself said quite clearly in the Gettysburg Address, he was committed to making sure "...that government of the people, by the people, for the people, shall not perish from the earth." I suppose you can argue that Lincoln's vision of freedom was not worth the price, but you cannot deny that he had a vision of freedom--and that, for him, this vision was compatible with maintaining the historic, unprecedented political freedom that was achieved in 1776.
1921 belongs to time where the juridical base was formed as a result to demands of the growing economic environment