Describing, understanding, explaining and regulating mobility requires transversal approaches. Traditionally, mobility analysis proceeds by partitioning into four differentiated forms according to two dimensions: the temporality of which it is based and the space in which it takes place. Each of these forms of mobility is the subject of an abundant literature and a specific disciplinary base. Motility may or may not be transformed into displacement, especially, it may be transformed into displacement in different ways, ways which mix the different forms of mobility. The notion of motility brings mobility into a new light: through the results presented, it responds to a dual logic of integration and disengagement in the sense of Hirschmann, which makes it a form of capital. While on the one hand mobility is becoming essential to reconcile increasingly numerous and spatially fragmented spheres of activity and projects, it also indicates a refusal by stakeholders to embark on irreversible paths.