Group formation in part happens through discourses that contribute to invent, sustain and transform our imagination of society. This collection of articles proposes an account of the discursive construction of groups, which is wider than the question of naming social or political groups. That discursive construction is a dynamic process that unfolds in time and proceeds as complex interactions between groups and within groups. Different perspectives on the phenomenon include political grouping or intermediary bodies, the community of origin or voluntary membership, self-identification or identification by someone else, with a historicised and multi-disciplinary approach.