A few decades ago Botswana relied solely on its agriculture and was one of the poorest nations in the world. However, ever since the discovery of diamonds in the late 20th century, Botswana has become a success story. Jwaneng, the richest diamond mine in the world when measured by value of recovered diamonds, has been the main source of the prosperity of the African country. Not only has the per capita income increased to close to $6000 a year, but the infrastructure has been improved as well. The country's citizens have seen new roads, hospitals, and schools as well as an improved system to deal with the H.I.V and AIDS problem the country has had.