Andrea Declich, a member of the K&I team of the SMARTEES project participated, on 22 and 23 of May 2018, at the 12th Society and Materials International Conference (SAM12) held in Metz, France (http://www.sovamat.org/). Particularly, he chaired the second session titled “social sciences and materials” and also presented a paper on “Social cycle of Materials and Collective Actors: Some Ideas for Analysis”. The issue of materials is important also for studying the energy transition. The focus of the paper was on collective actors and the ways in which they are able to promote social innovation, not only in general but also in the context of energy policy and transition. Some ideas were proposed on how to deal with these issues.