A more constructive, less idealistic discussion, would be asking questions such as "what's Jealousy for?"
The clue is that feeling jealous is an unpleasant emotion. Which means, it motivates the humans that feel it, to try & do something about it.
Typically, the behaviours caused by jealousy are antisocial.
However, those with a higher intelligence, can build up their willpower, & as such, be more passive observers of their emotions (rather than the puppets of)