An ape will be an ape, but a man will keep changing his being very often. Man becomes a Hitler, a Chengiz Khan, Timur Lame or Jack the Ripper. He turns into tyrant, a bloodthirsty dictator or a Nazi. Man has the this freedom and choice lying solely with him. Imperfection is a fundamental law of life.
Man is the only animal who is imperfect.
Dogs are not imperfect, each and every dog is a perfect dog. Cats are not imperfect, trees are not imperfect, rocks are not imperfect. In this whole vast existence man is the only animal who is imperfect. When you are perfect there is nowhere to go. Perfection will be suicide for humanity.