Explain why some Northerners who had previously not been involved in the abolition movement decided to support the freeing of slaves?

Explanation:he abolitionist movement was the effort to end slavery, led by ... some of the same tactics British abolitionists had used to end slavery in ... in the Dred Scott decision that blacks — free or enslaved — didn't have legal citizenship rights. ... former slaves, worked tirelessly to support the abolitionist movement.

pennsylvania, new hampshire, massachusetts, connecticut and rhode island .

in the 1900s, the united states was still a largely agrarian society with a very fast growing industrial and manufactering sector.

the south of the country was the bread basket of the country with large farm lands making up a majority of the economy.

in the north and more specficially north-west, growing manufactering and export sector had made the united states into a powerful exporting country.

this peaked in the 50s and 60s when the united states became the largest economy in the world and the largest exporter.

today, the majority of the united states economy is made up of the services sector that includes banking, insurance, music, movies, hotels etc.