@Simon: That is so true! All this crap goes back to the myth of the "Noble savage". Every sociologist who has ever tried to go into the jungle to prove there was such a thing has either had to falsify his data or face expulsion when his science failed to back up the orthodoxy amongst his left-wing peers.
If you look at the Incas, their society was hell, living humans being cut open and all. If the Spanish had only destroyed their society, killed their nobles, and taken their gold they should have been hailed as heroes freeing an oppressed people!