“Jealousy is like most of the other emotions, it comes from within. A big part of the problem lies within you and not with the person you are jealous of. The following are possible root causes for jealousy: ... Jealousy root cause #4: Insecurity: Feelings of insecurity are the result of the two previously mentioned causes.” www.2knowmyself.com/Dealing_with_jealousy/causes_for_feeling_jealous
Jealousy is a common emotion among Women. Women historically fight for positions of power by the Men who represent them. The breadwinners, and Women the caretakers. These positions of power are earned, by displaying characteristics we deem superior and likeable. (Opinion by Leslie Fischman).
When one does not feel good enough, when one feels inferior to, these are all emotions that manifest themselves into jealously. As a person who suffers from weight issues, this has been a common problem, wishing to always be thin. This is why I lost 50lbs in 2014-2015.
“Jealousy [is am emotion] …[that] comes from within.” When someone has something that you do not, this causes jealousy. That is a natural emotion in response to wanting something that another has, whether it be dress, appearance, or social standing. These are three examples of highly desired characteristics of what one would deem superior and likeable, characteristics or traits of what we define as feminine, and what we define as characteristics thought necessary when in competition for an asset Men, one would want to attain in order to earn Men they feel they deserve to be represented by. (As discussed above).
That is true that the “problem lies within you an not with the person you are jealous of.” That is because it is your emotion that you are feeling, and your emotion, which you are in control of. That is why it is your problem and not the problem of the person to whom you are jealous of. People to whom you are jealous of cannot make you not jealous of them, or change in demeanor or appearance or stature in order to make you feel more comfortable with yourself. Usually in order for this to occur, some form of acceptance and respect for the characteristics of another is necessary to be appreciated and for jealously not to occur.
It is stated above that “insecurity” is the root cause of jealousy.  Rather than see this as a weakness of character, once must view this response with acceptance of self, which comes first before the existence of an insecurity. When one is accepting of themselves than one does not feel insecure, when one does not feel insecure, then when one is around another they will not feel insecure. Those who are secure with themselves are both accepting of themselves and have a great perception of where they see themselves in the world in relation to others as well as what they have not yet been able to achieve for themselves. With that acceptance of one self, one feel secure. However, even those who are secure with themselves may be become jealous when one feels threatened by another. This is a different kind of jealously, one which is caused by the one who seeks to make the other jealous of them. Similarly the person who seeks to cause the feelings of jealously does so by triggering the qualities within themselves that are characteristic to those who are jealous, as stated above insecure.