Last summer, we looked at the collapse of the power grid in South Africa. The country which previously had the most economically stable and prosperous government in sub-Saharan Africa suffered waves of unemployment and looting as its economy buckled under the strain. They’ve managed to put together some foreign aid to apply patchwork fixes since then, but there are still rolling blackouts taking place on a regular basis. This winter, however, the power grid problems are spreading in one of the more underreported stories of the year. Zimbabwe and Nigeria are now also experiencing near-total collapses of their power grids....