3.1 Cities are subjected to constant change, experiencing natural cycles of growth and decline. Successful cities embrace change in a positive and enlightened fashion and use it constructively. The City Centre, the Inner Urban Area, the Outer Urban Areas, the areas where people live, shop, work and play, are all essential elements of the dynamic city. Some of these areas already contribute to Glasgow's well-being. Others are in need of substantial monetary, physical and social investment to allow them to play a similar role. The Plan recognises these different areas and promotes a range of action aimed at securing their future.