Making stone soup starts with a stone. After that everyone has a chance to add something that slowly cooks and melds with what others have added.
Creating a vision is like making stone soup. The soup will be better when some of each type of available ingredient have been added. These inputs need to be cooked, changing them as their juices mingle.
Everyone who put in an ingredient will want some of the soup. Those who were not asked to contribute may not even know about it, and may prefer to stick with their own ingredients that were not put in to the soup.
Stone soup starts with a stone. If your organization lacks a vision, you could change that. First you will need to find the “stone” that will be the core ingredient that doesn’t change. Then ask others to contribute their ingredients. If everyone adds to the recipe, and you don’t cook on too high a temperature, everyone is sure to enjoy sharing in the soup.