how did the new territories of Kansas and Nebraska would be slave or free states pull the nation apart?

The issue of whether Kansas and Nebraska would be slave states or free states ultimately led to increased tension and conflict between pro-slavery and anti-slavery factions in the United States. The Kansas-Nebraska Act, passed in 1854, allowed the residents of these territories to decide for themselves whether they would allow slavery within their borders, a concept known as popular sovereignty.

This decision sparked a race for control of the territories, with both pro-slavery and anti-slavery groups attempting to influence the outcome. This led to violent conflicts such as "Bleeding Kansas," where pro-slavery and anti-slavery settlers fought over the territory.

The debate over the status of Kansas and Nebraska as slave or free states also further polarized the nation along regional lines, with southern states generally supporting slavery and northern states opposing it. This tension ultimately contributed to the outbreak of the Civil War in 1861.

In conclusion, the question of whether Kansas and Nebraska would be slave or free states exacerbated existing tensions between the North and South, leading to increased conflict and ultimately contributing to the division of the nation and the onset of the Civil War.