No matter how evolved humankind becomes, we will always find ourselves at odds with those who would visit evil upon us. There will always be evil in the world. Evil is necessary in order for there to be balance in the universe. In both versions of the movie, The Day the Earth Stood Still, the "advanced" aliens admit to this ongoing struggle by creating robotic police to enforce peace among their own member civilizations throughout the universe. The moral of the story is that you shouldn't destroy good to eliminate evil, right to eliminate wrong, or you risk becoming the very thing you seek to destroy. But, it also speaks to not forgetting from whence you came. Everyone deserves the chance to evolve. If change is the only constant in the universe, then change must be allowed to happen.
If you’d like to read more of my thoughts concerning change and evolution, please follow the attached link: The Precipice