And, unlike most of the world's poor countries, South Africa, with its widespread welfare system, does not have a thriving informal economy where the jobless can take refuge.
Southern and western states have the highest shares of those who are thrice (or more often) married, partly because of younger median marrying ages, more poverty and poorer education.
Relieving the extreme poverty of many of the world's citizens provides a compelling rationale for worldwide growth in economic output, provided the income growth actually reaches those who need it.