The critical idea of the text is the prolonged cycles of conflict and humanitarian crises in Sudan and South Sudan, driven by historical divisions, resource competition, ethnic tensions, and political instability, leading to widespread suffering and displacement of millions. rephrase like a 8th grader

The main point of the text is that there have been a lot of fights and problems in Sudan and South Sudan for a long time because of past disagreements, not enough resources, different ethnic groups not getting along, and unstable governments. This has caused a lot of people to suffer and be forced from their homes.