This article reports on the relationship between gender and participation at the 2010 Southwest Florida Model United Nations (SWFLMUN). Three major findings emerge from this research: (1) Even though more females participated in the SWFLMUN than males, males accounted for most of the speeches and played more decisive roles in the formulation of the committee resolutions; (2) male and female delegates employed similar negotiating styles; and (3) surveys administered to delegates suggest that males and females derived about the same amount of satisfaction from the conference but that males, paradoxically, were more likely to report barriers to participation than females. These results leave the impression that gender is a significant, but unremarked factor in shaping participation. These findings are discussed with respect to a normative conception of Model UN (MUN) as a mode of global citizenship. MUN is designed to overcome national ethnocentrism by affirming the existence of multiple perspectives on world issues and by establishing a deliberative process through which these different interests and perspectives can be negotiated. The results of this research, however, suggest that gender stereotypes may alter the kind of political socialization that is both expressed and reproduced through MUN. Substantive inequalities associated with these stereotypes may be infecting formally inclusive public spheres-such as MUN-with the effect of coding politics as a competitive, male domain.