A secret network of people<span> who helped </span>slaves<span> escape to the </span>North<span>. ... </span>North<span>: Abolitionists increased their fight against </span>slavery<span> and the </span>Fugitive Slave Act<span>. South: Saw the book as an attack on the south and the southern way of life. T5hey technically fought back. </span>
I believe your answer is dissenting opinion.
"an opinion<span> in a legal case in certain legal systems written by one or more judges expressing disagreement with the </span>majority opinion<span> of the court which gives rise to its judgment."</span>
This is known as imperialism. I hope this helps!