4. why did it prove to be so difficult for many african countries to establish strong, thriving economies following independence?

Many of the ethnic groups differed from each other, and didn't agree with each others believes.

Explanation:

This caused many tensions, and rivalry throughout the different cultures. This led to civil war, and conflict throughout Africa.

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

they change the constitution.