Today the way we consider human psychology and mental development is heavily influenced by genetic sciences. We now understand the importance of inherited characteristics more than ever before. Yet we are still unable to decide whether an individual’s personality and development are more influenced by genetic factors (nature) or by environment (nurture).
Research, relating to identical twins, has highlighted how significant congenital factors can be for an individual life. But whether these characteristics are able to develop within the personality of an individual surely depends on whether the postnatal conditions allow such a development. It seems that the experiences we have in life are so unpredictable and so powerful that they can boost or over-ride other influences, and there seem to be plenty of research findings to confirm this.
My own point of view is that there is no one major influence in a person’s life. Instead, the traits we inherit from our parents and the situation and experiences that we encounter in life are constantly interacting. It is the interaction of the two that shapes a person’s personality and dictates how the personality develops. If this were not true, then we would be able to predict the behavior and character of a person from the moment they were born.
In conclusion, I do not think that either nature or nurture has the major influence on a person, but that both have powerful effects. How these factors interact is still unknown today and they remain largely unpredictable in a person’s life.