[Agonism and antagonism].

This essay considers dissensus as the starting point for the construction of a common epistemic space rather than as the acknowledgement of an irreducible disagreement. In the argumentative confrontation and disagreements, we do not want to identify a process which might lead to agreement through rational debate. The aim of this essay is rather to understand how dissensus leads to the constitution of plural communities. It discusses a certain number of texts of political philosophy (Habermas, Mouffe, etc.), where the notion of agreement is crucial to an analysis of argumentative confrontations. This essay uses the hypothesis to analyse the circulation of Leibniz's dynamics in his correspondence with De Volder. This perspective shows eventually that dissensus is not an obstacle but the basis on which multiple circulations of theories are possible.