(2) Could a city or nation, or the whole world, be themed with a single mono-theme?
Not really, because the theme would become the ordinary reality and cease to have structural contrast with the everyday. For instance, in the Renaissance and in the French Revolution people consciously tried to change the cultures of their whole society. They took up and referred to ancient Roman unities of meaning and ways of acting. This was not done in order to maintain a themed contrast with the everyday, but in order to change their everyday world for the better.
(c) David Kolb, 1 August 2001