From what I have read venusss early trauma can affect one's sensitivity level and one's personality as well. Now, that doesn't have to mean something negative. There are studies being done all the time to learn how early childhood trauma, or trauma in general affects the brain. It has recently been a question if trauma can also lead to an individual developing the symptoms of bipolar.

I recently read about a study that was done to see how the brain reacts to stress. What they learned is our brain does better when we "know" when something hurtful is going to take place, whereas when a person is told they will receive a shock at any time their brain shows a higher degree of stess.

That would make sense because people prefer to develop a structure in their lives where they can "predict" challenges and that is really part of everything we design/create be it an ideology, religion, language, time tables, weather predictions and all the written human scenarios that human beings have experienced throughout our human history.