The abolition of slavery. The North was predominantly industrialized and urbanized, and its economy was based on free labor. The South, on the other hand, was predominantly agricultural and rural, and its economy was based on slave labor. As a result, the two regions had fundamentally different views on the issue of slavery. The North generally saw slavery as immoral and unjust, while the South saw it as necessary for their way of life. The issue of slavery came to a head in the 1850s, and the country was deeply divided over the issue. The northern states were increasingly opposed to slavery, while the southern states were determined to protect it. In 1861, the southern states seceded from the Union and formed the Confederate States of America. The American Civil War began shortly thereafter, and one of the primary goals of the North was to abolish slavery.
The following are some of the specific things the North did to advance abolitionism:
1. Congress passed several laws restricting the spread of slavery to new territories.
2. Northern states refused to enforce fugitive slave laws.
3. The Underground Railroad helped tens of thousands of slaves escape to freedom.
4. Abraham Lincoln's Emancipation Proclamation declared that all slaves in the Confederate states were free.
5. The Thirteenth Amendment to the US Constitution abolished slavery throughout the United States.
Ultimately, it was the Union victory in the Civil War that secured the abolition of slavery in the United States.