>>In the meanwhile, the infrastructure is decaying, and a lot of countries won’t allow white South Africans to move there.<<
South Africa was originally mostly an uninhabitable desert wasteland before white people colonized it.
It takes intelligence and hard work to maintain the Dems and irrigation systems that allow South Africa to grow food.
And the people who know how are leaving.
https://sancold.org.za/dams-in-south-africa/
...Dams..