Envy may be defined as an emotion that "occurs when a person lacks another’s superior quality, achievement, or possession and either desires it or wishes that the other lacked it." It can also derive from a sense of low self-esteem that results from an upward social comparison threatening a person's self image: another person has something that the envier considers to be important to have. If the other person is perceived to be similar to the envier, the aroused envy will be particularly… (More on Envy)