Men are more susceptible to evil deeds...partly because they have a more self-serving nature, and partially because they have a shorter lifespan in which to learn from their mistakes (although most fail to learn from the lessons of history within their own short spans). Their have been examples of Elves who have been subject to greed, jealousy, and arrogance (Feanor and his line...perhaps misled by the wiles of Melkor, but they killed their kin for their boats and stained Valinor), as well as some downright nasty ones (Eol, the Dark Elf blacksmith, who possessively wedded Idril of GondolinTurgon's sister), and their son, who betrayed Onolinde out of jealousy of status.... Even King Thurandil was not kind to the companions of Bilbo Baggins, Ring-Bearer