Parliaments around the world are still overwhelmingly populated by men, yet studies of male dominance are much rarer than are studies of female under-representation. In this book, men in politics are the subjects of a gendered analysis. How do men manage to hold on to positions of power despite societal trends in the opposite direction? And why do men seek to cooperate mainly with other men? Elin Bjarnegård studies how male networks are maintained and expanded and seeks to improve our understanding of the rationale underlying male dominance in politics. The findings build on results both from statistical analyses of parliamentary composition worldwide and from extensive field work in Thailand. A new concept, homosocial capital, is coined and developed to help us understand the persistence of male political dominance.