International relations theory has greatly overlooked the importance of the vitality of international organisations and its variations. If organisations are not moving toward completing their...Show moreInternational relations theory has greatly overlooked the importance of the vitality of international organisations and its variations. If organisations are not moving toward completing their mandate, they cannot serve the purposes institutionalist theory ascribes to them. Mercosur, an economic integration process with the end goal of becoming a common market, is perceived by public opinion as a dormant organisation. Nevertheless, its activity in the last two decades seems to indicate that it is venturing into a new, non-economic agenda, although this has not been officially mandated to it. This thesis argues that, although Mercosur’s economic goals are currently stagnated, it has become a platform for its member states to further other socio-political interests, which has injected new vitality into the organisation. The approach of this thesis highlights the importance of institutional design in general for the subsequent performance of IOs and institutional flexibility in the scope of issues in particular, as a valuable theoretical framework to understand renewed vitality in international organisations.Show less