Bookmark for later reading. Sees like an interesting article. Thanks for posting.
If it wasn't for envy we would still be naked eating grubs from a stick. Envy is what ignites tribal warfare and is the special evolutionary force that drives human evolution. Humans will always self-divide into enviers and the envied. Even if we could eliminate our current batch, the enviers would spontaneously reform.
This chapter about "Envy and Its Transmutations" was well done: http://www.as.uky.edu/academics/departments_programs/Psychology/Psychology/faculty_research/faculty/richardsmith/Documents/Smith2004chapter.pdf