I'm not sure it can ever disappear completely. It exists as a lesson to all of us. Unfortunately it has silently crept into many country's globaaly while people were sleeping, distracted and deceived.
Nature, Truth, God & Good are Light. perversion, deception, devil/evil are darkness. darkness can only exist in the absence of Light and cannot exist in its presence. That's why it infiltrates by secret.
Even good people can feed evil unknowingly because they are unaware of truth. We are currently pushing back against the evil with truth. Dark to Light.