25 Association of Research Libraries Research Library Issues 296 — 2018 services. The intersections between RDA group formation, service development, and the concepts of radical collaboration offer interesting ground for exploring commonalities, differences, and possible roads to success that radical collaboration offers. The Evolution of Collaboration An important aspect of collaboration is its evolution. This is true of both RDA groups and institutionally based service development efforts, the differences being the available starting points and the supporting structures provided for the paths forward. Within RDA there is a process for forming groups that often starts with an informal gathering termed a “Birds of a Feather” (BoF), where people with a shared need or idea meet to talk through whether there seems to be sufficient expressed community interest to start coalescing around a shared end goal. Figure 1: How RDA working groups form The interactions in these BoF meetings vary and account for most of the potential starting points for collaborations. The exception, which I