I don't really agree with this idea. I exult in complexity! The fact that there's no black white or shades of gray in good and evil or any concept but rather a full spectrum of colours is one of the reasons I haven't gone and offed myself. Interest defines my entire life, and complexity sustains my interest.
If the world was simplistic and boring I would have no reason to live. Oh, that and I figured out how to mentally manipulate my own emotions. Thus I waver between malignant sociopath and overenthusiastic random! Good times.
Pure evil does exist in some forms, however. An example in gaming is in world of warcraft: deliberately seeking out and repeatedly killing lower level characters of the other faction. It's not fun or satisfying, all it creates is misery. Some people even devote their entire lives to it. An orc rogue named "" did this for years and posted hundreds of anguished outcries from his victims on his website because he thought it was funny. He paid for two separate WoW accounts to help him spy on potential gank victims.
Edit: An adult's potential intelligence is genetic but assisted by upbringing (music, education, et cetera). You know morons/imbeciles don't exist because they were brought up that way, right? It's wrong to claim that one is more important than the other because it varies from person to person. Some people develop better assisted and others develop that way regardless of specific nuances of culture.