The topic of the "community" has a fundamental relevance from the anthropological, ethical and political point of view. Starting from the years '80 in France, and then during the '90 in Italy, the debate has been developed in a very vivid manner. The possible-impossibility of the "community" is a very profound subject that has been treated in a particular dialectical manner by these authors. The article emphasizes the contribution of Jean-Luc Nancy, putting his thought in dialog with Badiou, Lacoue-Labarthe, Agamben, Blanchot, Jabes, Esposito, Derrida and -in a very deep manner- Plato.