Human nature can differ based on your background and the circumstance. For example, someone who grew up in a tough environment will probably not be nice. If a person grows up in a warm welcoming environment, then they will probably be nice. What a person might do if life is being their life is being threatened, might be unimaginable under normal circumstances. This leaves me to believe that people can be any emotion by nature. Humans are programmed to put themselves first. This means that people by nature are selfish. People in movies are characters, but the person that always does the selfish thing is the bad guy. While this might be true, humans are programmed make sure that they survive over other people, no matter the cost. Monkeys are the closest animals related to humans. Monkeys and their babies were put in a room. The floor was warmed, and the monkeys put their babies on the floor and stood on them. This shows that humans are by nature selfish. There are st