Nature
Assuming you read the newspaper, You know that Nature is all around us.   Technically, it's called a Complex Dynamic Adaptive System. They picked this name for a variety of reasons, not the least of which was because it is complex (lots of parts), dynamic (because the parts interact with each other) and adaptive (because it does change and adapt to meet the needs of the system as the components changed.   Also because the name Volkswagen was already in use and it would have been confusing for people to ask "Do you mean Volkswagen the car ? Or Volkswagen the Complex Dynamic Adaptive System ?" all the time in scientific circles.  

We call it Nature and it's all around us.   If you think nature does not affect you, wait until a swarm of Nature's ants decide to build a colony on your kitchen counter and you'll realize that while you can KILL the ants, right at that very minute Nature is planning a counter strike and tonight your cat will deliver more nature on your doorstep in the form of a dead rat or bird.   This is because Nature works well and all of it's {complex} components work with each other {dynamic} to overcome {adapt} what YOU want {peace and quiet and clean counter tops} in favor of what NATURE wants {no one really knows that}.  

The study of Nature is, in fact, really the study of EVERYTHING because Nature IS everything.   (Yes, I know that saying that might cause Nature to get a big head and think it can do a rock album, but it's true).   I am a Naturalist which means I observe and learn from what I see about how various parts of Nature interact with each other when they are left alone to do it.   Usually this involves the observing of wild animals in their natural surroundings, sometimes in captivity, and an occasional Frat Party at the local University.   What struck me, as a child (besides Mark Pfiefer in 4th grade) was that all the animals are far more SIMILAR than different.  

A tortoise, a monkey and a snail are all the same.   Yes, they look different and all that ...   but when threatened, they are fearful.   When challenged, they are angry {snail anger is not pretty}.   When hungry, they eat.   When horny, they go down to the seven eleven and pickup a copy of Playboy, go home in the bathroom and ....   no ...   wait ..   at least, that's what I HEAR that they do.  

Then ..   funny thing, I notice that HUMANS do the same thing! Does that mean that we are animals? Yep.   Not much DIFFERENT among the animals than we'd like to believe.   So if the same forces act upon us the same way they do the other animals, then we have the same Nature built inside each and every one of us.   Now if THAT is true, we can start looking at ourselves not as 'above it all" but as a PART of it and by looking at seemingly less complex examples of Nature, perhaps better understand our OWN nature.  

The term for the study of the human condition as it relates to us being a part of Nature is SocioBiology and it's implications and suggestions are not always pretty.   Among them:

O We are born to be what we are
O We have a hard time changing what we were born to be
O It may not always be a good thing for the SPECIES for us to try to be what we were not born to be.

But SocioBiology is a Science, which means that it conforms to generally accepted and widely proven rules that allow it to grow, demands that it correct itself when proven wrong, and always seek a deeper truth and underlying answers.   This is what separates Science from Belief Systems.  

Start reading with On Human Nature by E.O.   Wilson