Excerpts from Books and Wikipedia
"Botswana occupies the heart of the Kalahari Desert and surrounding steppe. Despite its lucrative diamonds, the great majority of its 2.3 million inhabitants are subsistence farmers, and in recent years Botswana has been the most severely AIDS-afflicted country in all of tropical Africa." [Geography: Realms, Regions, and Concepts, 17th Edition, p. 319]
"Botswana stands out as a unique example of an enduring multiparty democracy with a record of sound economic management, that has used its diamond riches for national advancement and maintained an administration free of corruption." [The Fate of Africa, p. 698]