We integrate existing conceptual models on transition dynamics and phases and a typology of transition intermediaries to examine how intermediaries advance transitions in different phases. We illustrate our conceptual insights through examples from car clubs, heat pumps and low-energy housing. We conclude that intermediation is paramount from predevelopment to stabilisation of a transition.
This article provides an extensive review and an updated research agenda for sustainability transitions, classified into nine main themes. The review shows that the scope of this field of research has broadened and connections to established disciplines have grown stronger. At the same time, we see that the grand challenges related to sustainability remain unsolved, calling for continued efforts and an acceleration of ongoing transitions.