Contrary to myth and misconception, the Aztecs were not a bloodthirsty, inhumane, deeply patriarchal and authoritarian society. Viv Jones is disabused of everything she thought she knew about this sophisticated civilisation by Dr Caroline Dodds Pennock. Dr Guy Middleton calls himself a 'collapsologist'. He attempts to solve the mystery of why and how past civilisations collapsed. Guy says that often popular explanations say more about the fears we have in our own time than about the archaeological evidence past peoples left behind.