Abstract
The Protestant Pentecostal phenomenon, rather recent in Brazil (1910), has taken root in the popular classes. After an initial period of implantation (1910-1930), its real growth began in the thirties. Its main progress though has to be situated at the contemporary period of Brazilian capitalism. During this period, a new element has appeared : the popular masses. Little by little, these come to participate, at least partially, in the national life, under the influence of the dominant groups and the populist leaders. This means that the popular classes are somehow present at the social and political levels.