Answer:
The Kansas-Nebraska Act, passed in 1854, was a significant piece of legislation that marked a turning point in the lead-up to the American Civil War. There were several key differences between the Kansas-Nebraska Act and both the Wilmot Proviso and the Compromise of 1850.
First, the Wilmot Proviso was a proposed amendment to a spending bill that would have banned slavery in any territory acquired from Mexico in the aftermath of the Mexican-American War. The Wilmot Proviso was never enacted into law, but it reflected growing concerns about the expansion of slavery in the United States.
The Compromise of 1850 was a package of legislation that aimed to address the issue of slavery in the territories. The Compromise included measures such as admitting California as a free state, creating a stronger Fugitive Slave Law, and allowing popular sovereignty in the territories of Utah and New Mexico. The Compromise of 1850 was successful in temporarily defusing tensions over slavery, but it was not a long-term solution to the issue.
The Kansas-Nebraska Act, on the other hand, was a law that created the territories of Kansas and Nebraska and allowed the settlers in those territories to decide for themselves whether to allow slavery. This concept of "popular sovereignty" was intended to solve the issue of slavery in the territories, but it ultimately led to violence and conflict in Kansas, as pro-slavery and anti-slavery settlers fought for control of the territory.
The Kansas-Nebraska Act was different from the Wilmot Proviso and the Compromise of 1850 in that it explicitly allowed for the possibility of slavery in areas where it had previously been prohibited. The Act also undermined the Missouri Compromise of 1820, which had prohibited slavery north of a certain line of latitude. These factors contributed to the growing tensions between pro-slavery and anti-slavery factions in the United States, ultimately leading to the outbreak of the Civil War.