Sentence:  <WSD>Members</WSD> of higher and lower social status often cluster around this nucleus , so that Protestant figures on social class give the impression of spread over all social classes ; but this is deceptive , for the core of membership is concentrated in a single social and economic stratum . 
Meaning of the word marked with <WSD> tags:  one of the persons who compose a social group (especially individuals who have joined and participate in a group organization)