Nigeria, July 27 -- Jose Eduardo Van-Dunem dos Santos was 37 when the ruling Popular Movement for the Liberation of Angola, (better known by its Portuguese acronym, MPLA) chose him to succeed its founding president, Augustinho Neto, in September 1979. By 2010, dos Santos had been in power for 31 years. But the shy and retreating dos Santos was neither an enthusiastic glad-hander nor a wildly popular figure.

For a long time, dos Santos laboured in search of a cure for both ailments. In 2010, he finally found one. Under Angola's 1992 constitution, the president was the only leader with national standing. The citizens elected him directly on a national ticket. In December 2006, the country issued a three-year notice of presidential election...