"Why do we do the things that we do"
Why do people do what we do? We can try to pinpoint our nature to many thinks like nourishing, psychological evolution, etc. In my opinion I think human is a combination of everything. Every normal human being are self-conscious. As a result, our behavior is based on our environment and personal issues. Even though we still have our basic evolutionary needs, we can control it. For example eating, even if we are famine we can hold our self back. Same goes for air, we can forcefully stop our self from breathing. These things have to be taught or learn through out your life especially in their childhood. My conclusion is that people do the things they do because from their childhood experiences this is what is most appropriate to them. In my opinions I think things we experience through out our entire life influence on why we do what we do.

Even though what we experience through out our life may form the base of why we do what we do. Immediate stimuli like our mood on this day might also is a big factor why we might act more actively or not. Behavior to me is a summarization of your life experiences and what you have learned.

People might argue that biological and evolutionary factors affect our behavior, I think that both these topics influence us. But we are self conscious, as a result we can control temptation. To be able to control temptation, one must learn and live through it. As a result life experiences and what you have learned is the most powerful tool to shape who you are. No matter what you do or why you do it, your behavior is a reflection of who you are.