What do you think human nature is? Include all the different aspects you think are important? If something is not part of human nature, but is part of behavior, where does it come from? Human nature is the behaviors or habits all humans naturally do or not do that are not influenced or taught by the culture we grew up in. There are many aspects of human nature, the most important ones are self-preservation this includes creating shelter to live in to stay out of the elements, procreation, and communication. Out of these three I believe self-preservation is the most important.
In the beginning of civilization people were forced to fend for themselves so creating a shelter to live in to stay out of the elements, creating weapons to protect yourself and family from predators, etc... were paramount to survival. Without this trait we would not care whether we lived or died, and we would cease to exist. This is followed closely by procreation, which also plays a huge part in weather we as humans continue to exist. And lastly communication, Humans need to communicate whether that's in a verbal or non-verbal form in order to survive, without communication we would continue to make the same mistakes over and over again and never advance. These aspects are the basic building blocks for society, whether that's as small as a tribe or as big as a country without these three humans would cease to exist.
There are also the smaller aspects of human nature which include but are not limited to, greed, envy, and aggression. These behaviors that we are preprogramed with, each in different degrees that we have to consciously resists at times. The society we grow up in does play a part on whether we conceal these traits or show them. For example, the United States has a very individualistic, we generally speak our mind and show our emotions, so these traits are not really concealed. No matter where or how you were raised we all to some degree have these traits. Some of the behaviors or habits we do can be labeled aspects of human nature but are not. These are often called second natures, they are the things we do every day but can't explain how, when, or why we were taught them. For example communication is human nature but the language you speak is taught by the people or society you grew up in. So language is a second nature or behavior.