Like many nomadic pastoral cultures, the Mongols had a segmentary society, originally organized into a hierarchy of families, clans, tribes, and confederations. While social classes including nobility, herders, artisans, and slaves existed, the social structure was not completely rigid and social mobility was possible.
Perhaps in the Civil War era, the Dred Scott decision angered Abolitionists as the Supreme Court declared African Americans could not be a US citizen as they were not mentioned as as in the Constitution and that Congress abused their power by abolishing Slavery above the Mason Dixon line and in the New Western territories.
Northerners and famously Fredrick Douglass denounced the court ruling.<span />
The Democratic Republicans preferred a decentralized system, fearing that a strong Federal government would be akin to returning to a Monarchy.
They were opposed by the Federalists who wanted a strong Federal government to push the country forward as a unified force.
during times of war The two that I know most about are his suspension of Habeas Corpus and then his issuance of the Emancipation Proclamation. On the first issue, people will often discuss that Lincoln unlawfully suspended the writ of habeas corpus during the war thus violating American Constitutional rights.