I believe that humans are inherently inclined to do evil things given the opportunity. We are all flawed.
To quote a great line from science fiction. "The universe is full of hunger, and hunger looks a lot like evil depending on which side of the fork you are on".
Consciousness is a thin layer that sits on top of the human brain to elevate it above the animal level.
However don't forget that humans can revert very quickly to the animal level of existence if something causes voluntary consciousness to collapse.
Most never experienced anything like this, but in bad times, be prepared to deal with humans that essentially have minds about the same as wild animals.
Think of the animals, they follow the rather harsh, cruel, unsympathetic and unforgiving laws of nature.
That will help you understand the base animal of the human mind that is fully capable of doing whatever it wants without your conscious mind.
Most people never bother to ask why they do the things they do, why did they choose xxx or feel xxx If they thought about it from a base animal/survival/evolutionary viewpoint, things might me a bit more clear.
One researcher made a very convincing argument of how much modern human politics is very similar to Ape social structures, down to the politicians kissing babies and pandering to the women and weak / betas.
Humans are not nearly as evolved as they think, an Ape may actually be better at winning an election if they could talk.
Civilization is a very fragile paint job over humans behaving much like a wolf pack or any other pack of wild animals.
If things get bad enough humans will revert to their basic animal pack hunting base programming.
Your ideas of morality, justice, decency, humanity are in large part based on the religious / social structure you grew up in.
It is very easy for someone else to have an almost opposite viewpoint for some reason and feel fully justified, so never assume anything is "universal".
Study the intelligent animals and the stupid animals, when something goes down, you'll see humans running the gamut fitting into similar behaviours.