Humans are born evil. They are selfish and violent, and do not care for the feelings of others. Ive worked in a nursery before, and this was at a church too mind you. Inheritantly Humans are evil. It takes an outside force for said human to change one's behavior to become "good"
Truly its the media, parentals, friends, and role models that cause a person to behave the way they do. If one is never taught to not take what they want, they shall take what they want. If someone is presented with the option of stealing for self gain, and another is telling them to, human nature dictates to take.
Humans are animals, and as all animals, you want. So you take. By whatever means necessary. Wether it is brutal actions, theivary, lying, or blackmailing, humans take.
Self gain, instant gratification, humans are evil.