You can't dump a beaver in the Sahara and expect it to survive.

Of course not. But beavers had also gone extinct in most of Europe (though not for as long), and have since been reintroduced to most of the continent. From an ecological perspective, the same can definitely be done for other species. And yet, there is a strange silence whenever the question is raised.

You don't have to do this in Botswana because the elephants are already in Botswana ...

There are a couple of problems. First, Botswana is a very dry country. About three-fourths of the land is desert, and the rest depends on a single river system. And global warming will make this worse. Second, the country is transitioning from a mining and tourism based economy to one based on agriculture and animal herding.

The combined effect is that there is going to be a water crisis. Guess what elephants do when their usual water sources dry up? Oh, and did I mention that Botswana has over 50,000 elephants? Either other countries have to take up some of them, or the elephants will have to be culled. This is the problem.