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In page Melanie Klein:

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Klein defines envy as "the angry feeling that another person possesses and enjoys something desirable—the envious impulse being to take it away or to spoil it."[1] According to Klein, envy is one of the earliest expressions of the death drive and is an innate emotion. Envy exists even before the infant can fully perceive the external world and the mother, and it affects the first object relation, which is the relation to the breast.[citation needed]