In the decades before the Civil War, the northern states O refused to follow federal law requiring the return of fugitive slaves.
O financed industrial development with money earned in the trade of cotton produced by slave labor.
O were unaffected by slavery.
O refused to do business with the slave states.
O boycotted all American cotton because it was produced by slave labor.

the answer is migration

1.the population change is near or at replacement level.

4. the birth and death rates are balanced.

6. sweden is most likely a developed country.

"the attempts of the proletariat to rise above this abasement"

nations must cooperate to bring about and maintain world peace.

nations must not wage wars or commit war crimes in a desire to control other nations.

i think i know which options you have but if these aren't options let me know