I arrived in Johannesburg, South Africa's bustling commercial capital and largest city, not knowing what to expect. I knew that the country had undergone a major political transformation when apartheid ended in 1994. I also knew that, like so many trading nations around the world, South Africa was in difficult economic straits because of the plunge in global commodity prices. But beyond that, I had no preconceived notions of it; most of what I heard from friends who had visited or lived there was too contradictory to offer much guidance. ...