I've been thinking about possible solutions for Zimbabwe, but there aren't many. The first step is to remove Robert Mugabe from power and, probably with international help, instill some sort of civility and credibility in the government there by appointing a just governor. But there are no protections against what happened to Mugabe happening to the new president/ruler. Absolute power corrupts absolutely, as Orwell said.
In the short term, Zimbabwe is kind of screwed. They have a hyperintelligent criminal dictator, a mass exodus of their most intelligent and rich people, and inflation so high that conducting business is impossible. And the government there doesn't seem to be doing anything drastic to fix these problems.
It's sad. More than ten million people live there in extreme poverty. And just ten years ago, it had some of the highest standards of living in all of Africa.