Learning the answer to the question of exactly how does the nervous system work will require time and research. The nervous system is considered to be the most complex system in the human body. You can find more information here: wisegeek.com/how-does-the-nervous-system....
Each neuron sends a signal to the next. These signals control all functions of the body and are made up of neurotransmitters. All sensory neurons send information to the brain and the brain decodes it and sends information to systems of the body to regulate what is happening.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.