We face a confronting reality: all of the one-brain marketing problems have been solved. In our post-genius era, we need to rebuild agencies so they can harness ‘scenius’. Scenius is the collective form of genius. It implies that the structures we build around individuals are as important as their talent. This essay offers a blueprint for how a Scenius agency can be created. It requires considerable sacrifice, however it will deliver significant long-term benefits to all parts of the agency.