>But to the point: the major driver of the early explosion of HIV on the continent was almost certainly large-scale vaccination and medical treatment campaigns by colonial governments, which injected staggering numbers of people in rural areas without adequate disinfection of needles.
Colonial governments were mostly out of Africa after the 1960s.
>In the present, the sociological drivers of HIV spread do include rates of nonconsensual sex (particularly between teen girls and older men). More important factors, however, are historical and contemporary patterns of urban/rural migration and long-distance transit networks. The distinctive forms of cyclical migration created by the shape of the mining industry in apartheid South Africa are the largest reason that the pandemic is so much worse in that region than anywhere else on the continent.
That's being very disingenuous. What makes periodic migration by miners in South Africa different from large-scale worker migrations elsewhere in the world? Mexican farm workers to the US, half of China, or for that matter Canadian, Russian, and Australian miners, or oil-rig workers everywhere. It's not so much the migration patterns, but what the migrants do (or don't do) when "back home".