The mobilized masculinity of democracies today is often presented as either a natural way for men to respond to the economic and political challenges of globalization or as a return to the patriarchal style of politics of the past. This article argues instead for an understanding of liberal democracy itself as gendered, being the collective masculinity of brotherhoods representing rivalrous nations. The first great transition from patriarchies and monarchies to brotherhoods and democracies is not being unmade now but facing a second transition to a different understanding of gender and power. This normative rise of a partnership model in families and politics is incomplete and highly contested everywhere. In the United States, it has become a partisan conflict expressed in gender terms. The Republican defense of the brotherhood state and its exclusive version of national good is countered by a newer but increasingly institutionalized vision of democracies as representing women and men equally. By more explicitly demasculinizing family headship and political leadership, social justice movements and the Democratic Party symbolically resist the restoration of gender norms privileging breadwinners and brotherhoods.