Its an obvious fact that you are influenced by the culture that you experiance every day. Regardless of whether you wish it or not, or are conscience of it. But it isnt simply the people around you as it is your scenery, objects you interract with, and your pre set genetic emotional disposition that eventually completes the transformation that creates the every day person you see on the street.
None of you will argue that if you beat a child daily for no reason whatsoever, it will begin to have an effect on his both his behavior, emotional, and mental well being. Subjecting him, perhaps, to a greater disposition towards anger, fear, and most likely a large portion of self loathing. All having an effect on the way he/she interracts with the outside world.
Likeways if you took that same child and placed him in an environment where his every need was doted upon, and an extreme lack of punishment he/she would begin to develop a sense of superiority.
Its the slut mentallity, if a women was sexually abused by her father she might then begin to think and believe sexual activity is the only way to recieve love from a male figure, simply because when she was young this is how her father expressed his "love"
Now of course none of this is this simple, there are many different types of quarks that decrease the impact of the environment on the finished "product" that we call the adult human. Genetic predisposition is a main one, it effects how easily they respond to certain emotions such as anger, happiness, and sadness. Often times these nuts and bolts can effect the environment around them having a further impact on the psyche of a child.
So in the end, think of the childs psyche as a car. The engine, wheels, and all other essential parts are the genetics, while the body, frame, and paint are the environmental impacts. A child's environment certainly has an effect, but it is by no means the nuts and bolts, rather it simply gives a recognizable shape to the mind and attitude.
"Reality is merely an illusion, albeit a very persistent one."