Male parliamentary dominance, rather than the corresponding female parliamentary underrepresentation, is the object of study in this thesis. This shift in focus implies a gendered analysis centered on men and men’s practices. The thesis contributes to our understanding of how male dominance is maintained and reinvented by empirically studying male parliamentary dominance in clientelist settings. Worldwide trends of parliamentary representation are analyzed statistically and constitute the starting-point for a case study of male political networks in Thailand. Clientelism is a strategy used by political actors to increase predictability in politically unpredictable settings. The thesis shows that clientelism is an informal political practice that requires the building and maintenance of large and localized networks to help distribute services, goods and/or money in exchange for political support. Where political parties also use candidate selection procedures that are informal, exclusive and localized, there are ample openings for clientelist practices to translate into political power and ultimately parliamentary seats. This study also coins and develops a new concept: homosocial capital. It shows that clientelist networks are and continue to be male dominated because homosocial capital, a political capital accessible only to men, is needed for electoral success. Homosocial capital has two main components: a perceived pragmatic necessity to build linkages to those with access to important resources in society and a more psychological desire to cooperate with individuals whose behavior can be understood, predicted and trusted.