In this chapter I survey the scene in a leisurely and informal way, outlining ideas and avoiding the computational and the nitty gritty until such time as they can fall into place. We are concerned in chapter one with the overview from a great height, the synoptic perspective, the strategic issues. In other words, this is going to be a superficial introduction; it will be sketchy, chatty and may drive the reader who is expecting detail into frenzies of frustration. So put yourself in philosophical mode, undo your collar, loosen your tie, take off your shoes and put your feet up. Pour yourself a drink and get ready to think in airy generalities. The details come later.