Since the early 1990s, increasing academic attention has been devoted to party membership. Numerous studies have evidenced a long-term declining trend affecting almost all traditional parties in Western Europe (Mair and Van Biezen, 2001; Van Biezen et al. 2012b). Yet, in recent years, there have been some signs of a revival of party membership (Whiteley et al. 2019). What are the main factors accounting for fluctuations in party membership levels across Western Europe from the 1990s until 2014? This is the main question this dissertation seeks to answer. The main objective of this dissertation is to identify the factors that significantly affect the ability of political parties to recruit members in Western Europe. So far, the academic literature has mainly focused on micro- and macro-level determinants of membership fluctuations and have involved long-term explanations of shifts in party membership. Their general focus has been to ask why citizens join political and not so much why and in which conditions political parties are able to recruit members. The impact of meso-level and short-term factors on party membership variations has been largely underexplored. To shed new light on these issues, this study proposes to apply theoretical perspectives and empirical tools developed by sociological and economical organization studies. Four main theoretical perspectives have been developed by organizational theories to explain variations in organizations’ size and structure: the evolutionary system perspective (ES), the sociological neo-institutionalism (SI), transaction cost theory (TCT) and the resource-based view (RBV). Explanatory insights from each of these perspectives were identified and explored in each of the four empirical chapters of this dissertation. Overall, this dissertation evidences several transformations in party membership. By diversifying temporal perspectives, units of analysis and levels of observation, it shows that the decline of party membership levels is not as universal and as linear as it is often assumed. Membership levels are affected by electoral and organizational lifecycles. Not all parties have been affected by the general decrease in membership levels and some new parties have managed to attract an increasing number of members. Besides, parties that have given their members a greater say in their internal decision making have generally managed to attract new members. By looking at infra-national dynamics of party membership, this dissertation also shows the importance of regional and local context and the heterogeneity of membership trajectories within the same party. It underlines the importance of electoral mobilization at the local level and the importance of individual recruiters for the composition of the membership. By reflecting on the causes of party membership fluctuations, this dissertation sheds light on some important challenges for the future of our representative democracies. / Doctorat en Sciences politiques et sociales / info:eu-repo/semantics/nonPublished

This research addresses the conflictualization dynamics induced by the politicization of religion at the supranational level. It tests the Union’s institutional capacity to routinize dissension, temper animosities, and reconcile divergences in the light of religiously-loaded, issue-specific controversies. So-called “morality issues” such as abortion or human embryonic stem cell research emerged onto the EU agenda at the end of the 1990s. The main sites of bioethical contention correspond to the European Parliament and Commission arenas, where political, social, and religious entrepreneurs have been pursuing ideological interests of either liberal or conservative nature. We developed an interpretative approach to their discourses and perceptions through the qualitative content analysis of semi-structured interviews and online documentary sources. A key task consisted in determining whether one observes the routinization of bioethical conflicts by European institutions (“business-as-usual” scenario) or whether the said conflicts are remaining extrinsic to the Brussels political game (“culture wars” scenario). In other words, is the emergence of new stakes – morality issues – prompting the emergence of new divisions and repertoires of action? We put to the test the normal course of EU politics in the light of (1) the structuration of morality divides along religious, political, and national frontlines; and (2) the materialization of morality antagonisms through discursive, bureaucratic, and mobilization weapons. Overall, the “polarization” and “political style” variables showed that the supranational debates on abortion and hESCR do not fully alter the logics of supranational governance; in return, the EU polity is not closed to the crystallization of politicized modes of dissent expression. The hypothesis of an intermediary scenario oscillating between policy-seeking and position-taking perspectives is thus confirmed. On the one hand, issue-specific alliances characterized by internal multifold diversities do play the institutional rules of the European political game in their quest for ideological influence on the decision-making process. On the other hand, limited supranational competences on religiously-loaded issues constrain conflicting factions’ leeway to a symbolic use of morality causes and beliefs as instrumental devices worth of credit-claiming and identity-posturing. / Doctorat en Sciences politiques et sociales / info:eu-repo/semantics/nonPublished

The thesis is related to transnational social movements’ production of knowledge. Particularly, the research investigates the developed norms and pathways of a Palestinian-transnational movement (the Boycott, Divestment and Sanctions movement- The BDS movement) during its formation period. The thesis reviews major social movement theories (i.e. Sidney Tarrow and Margeret Sikkink). While benefiting from major aspects of these theories, the thesis discovers that the researched movement suggests major deviations from these theories. Hence, the thesis mobilizes other literature, particularly of Pierre Bourdieu, to better account for cultural and social dimensions. This choice is enforced by the presence of academics that form a pillar in the movement. Yet, the thesis mobilizes together diverse dimensions from social movement literature, sociology and history (i.e. the historical trajectory of individual and collective actors), and with a constant check with the case itself. The methodological choice of the research goes back and forth between theories and the case (abductive methodology). Two chapters of the thesis are dedicated to the agency of the Palestinian actors in addition to interactions inside the field of power in Palestine. Another two chapters discuss transnational relations with a focus on European actors. Specific cases are chosen from interactions with Belgian and British actors. Moreover, interactions in three transnational fora are discussed.The research concludes that this transnational movement infuses diverse norms from different experiences and regions while adhering to universal norms such as comprehensive human rights. Moreover, the movement follows diverse pathways that include a Palestinian emergence, a Global Southern path and through the North. And these pathways enforce the adherence of the movement to specific norms. Such findings diverge from “Euro-centric” approaches in discussed social movements’ literature in the thesis. The research finally discusses other literature more relevant to the case (i.e. by Amitav Acharya), which argues that local actors try to protect their norms from abuse by central forces, and they do not only import norms but also diffuse new norms. The thesis ends up with questions for further research on the patterns of norms diffusion. / Doctorat en Sciences politiques et sociales / info:eu-repo/semantics/nonPublished