This paper discusses mobilities from the viewpoint of the systems that structure, organise and permit multiple mobilities. This is considered both historically and in the current century. The paper shows that in the twenty-first century, interdependent digitised systems of mobility are at the core of contemporary societies. It also shows more generally that the study of mobilities cannot but be central to deciphering the principal contours of life in a world that combines exceptional freedom (at least for some on some occasions) and exceptional system dependence. Methods and theories need to be ever on the move to keep up with new systems of individualised scheduling and of system structuring and monitoring.