My thinking on some new themes or on the development of previous themes will continue following different ways. Causality in social sciences led to many theses and numerous developments. I already approached this question in the volume on Probabilityand social sciences (2012) , but this theme needs to be developed in a more detailed way in the works I will undertake. I think to deal with it on using the mechanist approach, already developed by a number of philosophers and researchers. I undertook also some new research on the links between scientific though and common opinion. This research, as the one on cumulativity, is involving a number of researchers in social science and philosophers. I will also take a more epistemological view on the numerous works I undertook in the past on mobility as well internal as international. A paper is in preparation for Population and a more important volume may be undertaken.