This article offers a systematic comparative reconstruction of Jürgen Habermas’s theory of communicative rationality and the Philosophy of Belonging (PB) in order to clarify the conditions of possibility of sustainable cooperation in complex, pluralistic societies and fragmented international systems. While Habermas provides the most robust contemporary framework for grounding normative legitimacy through discourse ethics, communicative action, and deliberative law, this work argues that discursive legitimacy alone cannot explain the stability of cooperation under conditions of structural inequality, institutional fragility, economic shocks, and geopolitical tension. The Philosophy of Belonging expands the Habermasian framework by introducing belonging as an operative institutional bond composed of symbolic recognition, material inclusion, credible expectations of reciprocity, and enforcement capacity. The central thesis is that discursive legitimacy is a necessary condition for normativity, but only institutional belonging—open to individual freedom and creativity—makes cooperation durable, inclusive development sustainable, and social peace possible. The article develops a multi-level analytical comparison (semantic–pragmatic, normative, institutional, and dynamic), proposes a causal mechanism explaining the endogenous transition from cooperation to coercion, and articulates a theoretical synthesis linking political philosophy, institutional economics, and conflict theory. It contributes to contemporary debates on democracy, polarization, political economy, and international order by integrating legitimacy and institutional sustainability within a unified explanatory framework.
Carlos Federico Obregon Diaz (Thu,) studied this question.