Sentence:  A major component of jealousy, for many people, is the suspicion or resentment of the rival. In Kerista, on the other hand, the relationship that every man had with the other men and that every woman had with the other women elicited what they called “<WSD>compersion</WSD>” rather than jealousy. 
Meaning of the word marked with <WSD> tags:  The feeling of vicarious joy associated with seeing one's sexual or romantic partner having another sexual or romantic relation that brings them joy, coined as antonym of (sexual or romantic) jealousy.