Historically, the Roman Catholic Church is seen as an obstacle to progressive social and political change in Latin America. Beginning in the 1960s, however, the Second Vatican Council and the growth of liberation theology prompted doctrinal and institutional changes in the church in Brazil and several other countries. From an ally of the conservative oligarchy and establishment, the church turned into an engine of mobilization for grassroots movements and a focal point for popular opposition to authoritarian governments. One of the more significant and widely researched changes in the “popular church” was the establishment of thousands of ecclesiastical base communities (CEBs) among the poor. The fact that the majority of CEB participants are women has received far less attention.