Psychological insecurities within dating and relationships
I believe any individual who is not comfortable within their own skin - therefore disconnected from their 'inner peace' - can develop narcissistic characteristics.
External factors such as race, class, income status or religion place no importance as to whether or not an individual will be narcissistic. There are three broad types of people living with inner pain and emotional insecurity (which applies to the greater community): No-one is perfect and this is totally understandable!
Psychologists state that 1% of the population is diagnosed with NPD, and that 75% of the cases in therapy are men.
Another distinction, which makes women traditionally more susceptible to narcissistic abuse, is: they are biologically and genetically engineered to have a focus on 'the one', and will try to make painful relationships work, whereas most men have a greater capacity to think in terms of 'there are other opportunities available'.
There are no firm statistics available in regard to the frequency of Narcissistic Personality Disorder (NPD).