If mankind started out without any negative traits that like greed, ego, anger etc., how would it shape our civilization up to this date? Would we have created the perfect utopia or made ourselves extinct long ago? Are our flaws holding us down or are they the reason our society made it to this point?
Without greed, we don’t have a drive to be better and improve our selves. Without ego, we lack a self to care about in the first place. And without anger, we lose a strong emotional response to the unjust treatment of our peers.
Even though you can come up with a million negative things they also bring, at least in moderation, these flaws are probably just as you say the reason our society made it to this point!