Promote economic freedom.

For example: https://magatte.substack.com/p/why-africa-needs-startup-cities

Teaching enough people in South Sudan how to grow food and raise/keep livestock will make them self sovereign individuals and then everything else will sort of fall into place?

Main reason is corruption and political instability. This leads to disruptions in economic activities, affecting businesses, investments, and the overall economic environment. In my point, to overcome this situation enhancing political freedoms and ensuring fair electoral processes can increase public trust and participation. Investing in education, healthcare, and infrastructure can improve quality of life and social stability. It takes time but first citizens of these poor countries must take politics seriously.