Of course the 800 pound gorilla in the room on this topic is evil. When was there evil in the world? At first there was no law. All was natural. God saw that it was very good and rested on the seventh day.
I believe we have a propensity toward evil since those days in the Garden of Eden. We know what is right but we choose to do otherwise for a multitude of reasons. Eventually we don't even know what is right. What is right becomes what is expedient. Your actions follow your beliefs. Life becomes one narrow and selfish series of events. When things are all relative, then there is no vision. Without vision a person perishes. Darkness prevales.
After darkness is light though. It is a lie that one should abandon all hope when one enters the darkness. Here is a tiny candle for you, Dante Alighieri.