On the basis of the research presented in the volume, the chapter develops an innovative interpretative proposal according to which the involvement of young activists in radical-left groups constitutes a component of a broader lifestyle, that is to say that these individuals share a common set of practices—developed both in their groups and outside them—interconnected by a unified sense and relational meaning, through which they develop processes of collective identification, mutual recognition, socio-cultural positioning, and identity building. In parallel, two further hypotheses are advanced. The first is that today other forms of youth action and public presence, traditionally investigated as forms of social and political participation, may be more effectively interpreted through the lens of lifestyles. The second is that the current distance of many young people from various forms of action in the political field may be understood not only as a result of the weakness of their values in this field and their weak trust in its actors, but also as a consequence of the fact that only partly do such forms allow satisfying the complex and varied framework of desires, tastes, and sensitivities that often guide youth participation.