How did people in the North and South resist slavery?

The African freedom movement. They resisted capture and imprisonment, attacked slave ships from the shore and engaged in shipboard revolts, fighting to free themselves and others. Sometimes pregnant women preferred abortion to bringing a child into slavery. On the plantations, resistance reduced profitability. Enslaved Africans tried to slow down the pace of work through pretending illness or breaking tools and they ran away whenever possible, escaping to South America, England or North America. No matter what punishments were carried out, or how many harsh laws were passed to control them, enslaved Africans still rebelled. Many former slaves also worked with the abolitionists in Britain and elsewhere;

The league of nations was found in 1919 to keep peace after world war l.but it failed to prevent world war ll in 1939,so in 1945 the nations of the world set up a new organization,the united state (un).since then, the un has encouraged international cooperation and worked to resolve conflict