Conceptualizing and assessing norm strength in International Relations

Abstract

What constitutes a strong or a weak norm? Scholars often refer to strong or weak, or strengthening or weakening norms, yet there are widespread inconsistencies in terminology and no agreed-upon measures. This has hindered the accumulation of knowledge and made it difficult to test competing hypotheses about norm development and contestation. To address these conceptual problems and their analytical implications, this article conceptualizes norm strength as the extent of collective expectations related to a principled idea and proposes two indicators to assess a norm’s strength: the level of international concordance with a principled idea, and the degree of international institutionalization of a principled idea. The article illustrates the applicability and utility of the proposed conceptualization by evaluating the strengths of two transitional justice norms: the norm of legal accountability and the norm of truth-seeking. In so doing, the article resolves empirical disputes over the origins and status of these norms. In particular, the analysis reveals that while legal accountability became a norm in the early 1990s and is today a strong norm, truth-seeking emerged later and remains a weak norm. More generally, the proposed framework should advance existing debates about norm contestation, localization, violation, and erosion.