Does Your Backbone Organisation Have Backbone?

In this article from SSRI it notes that most nonprofits know the five central components of any collective impact action. The first four—a common agenda, a shared measurement system, mutually reinforcing activities, and continuous communication—may take work to accomplish, but they are not hard to understand.  It’s the fifth one—a backbone organization – that creates problems. What is the role of the backbone organisation, is it a facilitative body or an executive one?