When we at the GEF IEO looked at how impact was scaled up in GEF-supported interventions, many of the interviewees used terms such as “magic moment”, “luck” or “perfect storm” when referring to how scaling-up happened “spontaneously” through serendipitous circumstances, even when the project itself had no concrete plans for scaling-up. On the other hand, we also know how seemingly successful programs can quickly fall apart under political and economic changes.