OK, typical goofy propaganda piece to explain how we got here and what to do about AIDS. I can't really understand where science stops and the speculation begins??
Paragraph 4 - "It is easy to argue that many", P7 - "If he is right", P13 - "Hawkes found clues", P14 - "This, Hawkes believes, is evidence", P18 -"Other genetic shifts in our archaic ancestors may also".
And the BLOCK_BUUSTER conclusion, "When it comes to a disease like Aids we can do something that chimps can't. We can use condoms."
Why not try getting married and having kids and no fooling around?
Well, I don't want children. But that doesn't seem relevant, since I still don't have any desire to engage in activity that puts me at high risk for contracting HIV.