Dear all,
Here comes a text on a topic I have been working on and thinking about for a while, I have been giving presentations, written small papers and I have tried to support my initial idea by reading in different areas. It falls, I am afraid, in an unhappy middle-position between regular article and preparation for a larger book-project, but apart from obvious repetitions and a faulty bibliography hopefully we will have something to discuss anyway. So clearly this is work in progress and therefore all ideas and critical comments are welcome.