There are no problems with the "endangered" whitetail deer here in Alabama. See the example with Botswana and Elephants, the White Rhino in South Africa etc. You can have opinions but you can't make your own facts. You create a legal, controlled, economically viable open market it for the most part not only gets rid of black markets but the locals have some employment, an incentive to protect the animals etc.
Yes, I accept the point you are making but I'm not sure I had made my own facts....
As stated elsewhere.....I think the situation is a bit different for Black Rhino.....nevertheless, I could accept perhaps some limited hunting if it preserved the whole environment and only involved animals that required culling anyway as part of management plans (e.g. elephants in Kruger) but I don't think Black Rhinos fit into this category.
If people really want a Black Rhino head to put on the wall then why not donate some money to a zoo that holds them in return for a carcass of one that dies naturally....as has been stated there soen't seem to be much 'sport' in it.
Also, while discussing books that may be helpful in providing some background to the various issues discussed here...another of Jared Diamond;s books 'Collapse' is also relevant in places.