I don’t think most people realize how easy it is to ruin some types of land. You almost couldn’t ruin land in most of England, for example. Same with much of continental western Europe.
That’s because the soil is reasonably decent due to the nature of the plant and other life in it, and because it rains very frequently, all year long.
Where I live, the annual rainfall is about twice that of England, but it mostly comes twice a year with very dry spells in mid-winter, and mid-summer,.,…
SA is more fragile still. Its rainfall is very concentrated in most of the country with very long hot, dry spells that dessicate everything. Farming really has to be done with care, similarly to the way “dryland farming” is done in places like western Kansas and Oklahoma. And it’s more capital intensive. The Dust Bowl comes to mind.