Budde contends that world Catholicism, led by its Third World majority (most notably in Latin America), will continue to develop in an increasingly anticapitalist direction; and he suggests that once-dominant First World Catholic churches (exemplified by the U.S. Catholic church), are poorly placed to respond in solidarity with their coreligionists from the Third World. Covering a wide range of theoretical and substantive matters, The Two Churches examines religion as a source of both social legitimation and social rebellion. It demonstrates the importance of ecclesiology, a branch of theology dealing with "theories of the church," and it highlights the effect of capitalism on world Catholicism, as well as the latter's influence on the development of the capitalist order.