[scirocco]

Read about this in a book recently, not sure which.. Parents who abandon/do not care about their child, will raise a child which believes no one values them. This causes them to believe they are not worth much, thus they will be afraid of going out and getting their voice heard as an adult - because deep inside, they believe their voice to be worthless. This person will avoid risk, avoid being heard as it may be "punished", according to previous experience..