As a woman i find this question very thought provoking-with good reason.
A few years ago i made a choice to actively celebrate what other women in my life accomplish, even if they beat me at something.
Jealousy in my opinion, is the driving force in women who choose to be vindictive and what causes it varies from person to person.
I would say excess competitiveness and insecurity are among the biggest driving forces of jealousy.The need to have what others have without necessarily working for it.
No wonder the Bible does say that we should not covet what our neighbors have.
Life has taught me to compete with myself, with the talents that i have and against my competition only to a reasonable extent.Being content is the best way to avoid that kind of horrible behavior so often seen in women.That way when someone does something horrible, you just ignore them till they get tired.