Sentence:  The vulnerability of <WSD>Protestantism</WSD> to social differences stems from the peculiar role of the new religious style in middle-class life , where the congregation is a vehicle of social and economic group identity and must conform , therefore , to the principle of economic integration . 
Meaning of the word marked with <WSD> tags:  the theological system of any of the churches of western Christendom that separated from the Roman Catholic Church during the Reformation