Arguably one of the most important political theorists of our time, Ernesto Laclau has produced an extremely influential theoretical corpus involving a multitude of methodological and political implications. His contribution is mainly focused on three fields; discourse, hegemony, and populism, all of them highly connected with communication and mediation processes. In particular, Ernesto Laclau has introduced, throughout his career, a complex conceptual apparatus (comprising concepts like articulation, the nodal point, dislocation, the empty signifier, etc.) as a result of the radicalization and re-elaboration of the Gramscian conceptualization of hegemony. According to this framework, elaborated for the first time in Hegemony and Socialist Strategy, co-authored with Chantal Mouffe (first published in 1985), discourse is a social practice that performatively shapes the social world. Human reality is thus articulated through discourse and obtains its meaning precisely through this discursive mediation. All social practices are therefore understood as discursive ones. To the extent, however, that processes of articulation are never taking place in a vacuum and are bound to involve different or antagonistic political orientations, the field of discursivity comes to be seen as a field marked throughout by the primacy of the political. As a result, any hegemony will be contingent, partial, and temporary. In addition, Laclau is one of the most well known analysts of populism, to which he has (partly) devoted two of his books, Politics and Ideology in Marxist Theory (1977) and On Populist Reason (2005). Populism, for Laclau, is designated, as expected, as discourse, as a specific way to articulate and communicate social demands as well as to form popular identities, to construct “the people.” His elaborations of populism are surely critical for the analysis of a pervasive political phenomenon of our era. All in all, the thought of Ernesto Laclau remains influential in the sphere of theory and political practice, and his theoretical arsenal will be an extremely helpful tool for academics and researchers of discourse theory and political communication.